Home, property, and project planning

Home Purchase Loan and Amortization Estimate a fixed monthly principal-and-interest payment from a home or purchase price minus a down payment, and inspect every payment in the amortization schedule. Retirement Contribution Forecast Project an accumulation balance from existing retirement savings and an annual contribution budget deposited in twelve monthly installments, with a yearly growth table. Monthly Savings Growth Forecast how a starting balance and regular monthly-end deposits accumulate, with contributions, interest, and year-by-year balances shown separately. Recurring Investment Growth Compare hypothetical investment accumulation scenarios using an annual investing budget split into monthly-end contributions, including constant negative-return scenarios. Fixed-Payment Debt Payoff Find the number of monthly payments needed to clear a balance, including total interest and a smaller final payment, while rejecting payments that cannot reduce the debt. Inflation and Purchasing Power Distinguish the future amount needed to match today's cost from the purchasing power of an unchanged future amount, using your own constant inflation or deflation scenario. Lump-Sum Compound Interest Grow a single initial amount with monthly compounding and no further deposits, showing the yearly balance and the share attributable to interest. Simple Interest and Final Balance Calculate interest charged or earned only on the original principal over an explicitly stated number of years, including fractional-year periods without compounding. Monthly Deposit for a Savings Target Solve for the monthly-end contribution needed to reach a chosen future balance after accounting for existing savings and hypothetical monthly-compounded interest. Gross Hourly and Salary Equivalents Convert an hourly wage or annual gross salary into annual, monthly-average, paid-week, and hourly equivalents using your own paid-hours and paid-weeks assumptions. Compound Annual Growth Rate Convert a beginning value, ending value, and elapsed years into a smoothed annual growth rate, including declines and total losses when there are no intervening cash flows. APR and Effective Annual Rate Converter Convert between nominal APR with compounding frequency and the effective annual rate. Present Value of a Future Sum Discount a future amount back to today at a constant annual rate. Future Value of Annuity Growth of equal end-of-period payments at a constant rate. Present Value of Annuity Today's value of equal future payments, e.g. a loan's principal. Rule of 72 Doubling Estimator Mental-math estimate of years to double money at a fixed rate. Net Present Value (NPV) Value of a cash-flow series with the first flow at time zero. Basic Bond Price Fair price of an annual-coupon bond from yield to maturity. Gordon Growth Stock Value Constant-growth dividend discount value with sanity checks. Emergency Fund Target Cash buffer from monthly essential spending and chosen months of cover. Real Return (Fisher Equation) Inflation-adjusted return from nominal return and inflation. Generic Loan Payment Calculator Estimate periodic payment, total repayment, and interest for a fixed-rate amortizing loan. Altman Z-Score Calculator Estimate a company’s Altman Z-score from five accounting ratios used in a bounded financial-distress screening model. After-Tax Cost of Debt Calculator Estimate the after-tax cost of debt from a nominal borrowing rate and an entered tax rate. Annualized Return Calculator Convert an initial value, final value, and holding period into a compound annualized return. Cash Flow to Debt Ratio Calculator Compare operating cash flow with total debt as a percentage-based coverage ratio. Free Cash Flow Calculator Estimate free cash flow by subtracting capital expenditures from operating cash flow. Price-to-Cash-Flow Ratio Calculator Calculate a price-to-cash-flow multiple from share price and cash flow per share. Fibonacci Retracement Level Calculator Calculate common retracement levels between a selected low and high price. Average Collection Period Calculator Estimate days to collect receivables from average accounts receivable and net credit sales. Asset Appreciation Calculator Calculate absolute and percentage appreciation between an initial value and a current value. Basis Point Converter Convert a percentage-point change into basis points and a decimal rate change. Beta from Covariance Calculator Calculate a simple beta coefficient from covariance with the market and market variance. Price Elasticity of Supply Calculator Calculate midpoint price elasticity of supply from two price and quantity observations. Bond Current Yield Calculator Calculate a bond’s current yield from annual coupon income and its current market price. Bank Reconciliation Adjusted Balance Calculator Calculate an adjusted bank balance from deposits in transit, outstanding payments, fees, interest, and a signed other adjustment. Operating Profit Calculator Calculate operating profit and margin from revenue, cost of goods sold, operating expenses, and net other income or expense. Cash Flow Accrual Ratio Calculator Calculate a simple accrual ratio from net income, operating cash flow, and average total assets. Annual Pay Calculator Convert pay per period into annual pay and a monthly equivalent using a selected number of pay periods and annual bonus. Average Propensity to Consume Calculator Calculate the share of disposable income spent on consumption and the complementary saving share. Additional Funds Needed Calculator Estimate additional external financing from projected sales growth, asset intensity, spontaneous liabilities, retained profit, and payout. Annual Salary to Hourly Equivalent Calculator Convert annual salary into monthly, weekly, and hourly equivalents using work weeks and hours per week. Real Estate Capitalization Rate Calculator Calculate capitalization rate and implied property value from net operating income and a selected cap rate. Simple Child Budget Calculator Estimate a planning total from selected recurring child-related cost categories and a yearly one-time cost. Straight-Line Appliance Depreciation Calculator Estimate straight-line annual depreciation, current book value, and remaining life for an appliance or equipment purchase. Cake Pricing and Margin Calculator Estimate a cake price from ingredient cost, labor, overhead, and a selected markup percentage. Retirement Account Growth Calculator Estimate future retirement-account value from a current balance, annual deposits, employer match, return, and years. 50-30-20 Budget Allocation Calculator Split a monthly income into needs, wants, and savings using the selected 50/30/20 planning convention. 70-20-10 Money Allocation Calculator Split income into living costs, saving or investing, and giving or flexible goals using a 70/20/10 convention. Hourly Pay to Annual Income Calculator Convert hourly pay, weekly hours, and working weeks into gross annual and monthly income equivalents. Annuity Future Value Calculator Estimate the future value of equal periodic deposits under a constant periodic interest rate. Annuity Payout Calculator Calculate the equal periodic payout from a present balance, interest rate, and payout term. Annuity Present Value Calculator Calculate the present value of equal future payments under a constant periodic discount rate. Annual Percentage Rate from Interest Cost Annualize an interest charge from principal and elapsed days using a simple non-compounded APR convention. Annual Percentage Yield Calculator Convert a nominal annual rate and compounding frequency into an effective annual yield. Accounts Receivable Days Calculator Estimate average collection days from receivables, credit sales, and the selected days-per-year convention. Adjustable-Rate Mortgage Payment Scenario Compare initial and reset payments for an adjustable-rate mortgage under two explicitly entered fixed rates. Vehicle Loan Payment Calculator Estimate a vehicle-loan payment from price, upfront contribution, fees, rate, and term. Average Variable Cost Calculator Calculate average variable cost from total variable cost and units produced. Balance Transfer Fee Calculator Estimate an upfront transfer fee and resulting balance from a card or loan balance and a stated fee percentage. Balloon Loan Balance Calculator Estimate the remaining balance after equal payments on a fixed-rate loan when the term is shorter than full amortization. Biweekly Mortgage Payment Calculator Estimate a fixed-rate mortgage payment every two weeks and compare its simple annual payment total. Bond Equivalent Yield Calculator Annualize a discount instrument's price gain using face value, purchase price, and days to maturity. Current Bond Yield Calculator Calculate a bond's simple current yield from annual coupon income and market price. Blended Interest Rate Calculator Calculate the weighted average rate across two balances using their amounts as weights. Compound Growth Calculator Project a starting value through repeated periods of constant percentage growth or decline. Personal Budget Balance Calculator Calculate monthly budget balance, planned savings, and remaining amount from income and spending categories. Build or Buy Cost Comparison Calculator Compare total build and purchase costs for a selected quantity using fixed and per-unit assumptions. Cash Burn Rate and Runway Calculator Calculate average monthly cash burn and estimated runway from starting cash, current cash, and elapsed months. Vehicle Payment Affordability Calculator Compare an estimated vehicle loan payment with a monthly payment budget after a down payment. Straight-Line Vehicle Depreciation Calculator Estimate annual straight-line depreciation and current value from purchase value, residual value, and age. Cash-Back Reward Calculator Calculate gross cash-back rewards and net reward after an annual fee from spending and a reward rate. Cash-on-Cash Return Calculator Calculate a simple cash-on-cash return from annual cash flow and the cash invested. Customer Churn Rate Calculator Calculate customer churn and retention percentages from customers at the start of a period and customers lost. Cost of Goods Sold Calculator Calculate cost of goods sold from beginning inventory, purchases, and ending inventory. Combined Ratio Calculator Calculate a descriptive combined claims-and-expense ratio against earned premium. Weighted Average Cost of Capital Calculator Calculate a weighted average cost of capital from equity and debt values and supplied financing costs. Total Cost of Doing Business Calculator Calculate total and average cost from fixed cost, variable cost per unit, and output volume. CAPM Cost of Equity Calculator Calculate a supplied beta-based cost of equity using the capital asset pricing model. Bond Coupon Payment Calculator Calculate annual and per-period coupon payments from face value, coupon rate, and payment frequency. Bond Coupon Rate Calculator Calculate a bond coupon rate from annual coupon cash flow and face value. Credit Utilization Ratio Calculator Calculate total revolving credit utilization from balances and available limits. Days Inventory Outstanding Calculator Calculate the average number of days inventory remains outstanding from average inventory and cost of goods sold. Days Payable Outstanding Calculator Calculate the average number of days a business takes to pay suppliers from average payables and purchases or COGS. Debt-to-Asset Ratio Calculator Calculate total debt as a percentage of total assets. Operating Expense Ratio Calculator Calculate operating expenses as a percentage of average assets or another supplied base. Shift Pay Scenario Calculator Calculate gross pay for regular and overtime hours using a supplied hourly rate and multiplier. Bond Price and Convexity Scenario Calculator Estimate a plain fixed-coupon bond price and cash-flow convexity from supplied terms and yield. Work Burndown Pace Calculator Calculate remaining work, planned daily pace, and the pace required to finish by a supplied deadline. Business Value Multiple Scenario Calculator Estimate a scenario value from revenue, growth, operating margin, and a supplied valuation multiple. Advertising CPC, CPM, and CTR Calculator Calculate cost per click, cost per thousand impressions, and click-through rate from campaign totals. Cross Exchange Rate Scenario Calculator Multiply two supplied currency quote ratios to derive a cross rate and convert an amount. Customer Effort Score Average Calculator Calculate the average of supplied customer-effort responses and the response count. Commercial Lease Occupancy Cost Calculator Estimate lease-period base rent, operating expenses, and combined occupancy cost from supplied area and rates. Comparative Advantage Opportunity-Cost Calculator Calculate opportunity costs for two producers and identify the lower-opportunity-cost producer for each good. Credit Spread Basis-Point Calculator Calculate the yield difference between a credit instrument and a benchmark in percentage points and basis points. Debt Service Coverage Ratio Calculator Calculate a coverage ratio from net operating income and annual debt service. Effective Duration Scenario Calculator Estimate effective duration from a base bond price, prices after a symmetric yield change, and the yield change size. Equivalent Compounding Rate Calculator Convert a nominal rate under one compounding frequency to an equivalent nominal rate under another frequency. Expected Utility Scenario Calculator Calculate expected value and variance for three outcomes with supplied probabilities and utility values. Full-Time Equivalent Calculator Convert total work hours into full-time equivalents using a supplied standard full-time schedule. Gross Rent Multiplier Calculator Calculate a property’s gross rent multiplier from price and annual gross rent. Income Gini Coefficient Calculator Calculate the Gini coefficient for a comma-separated list of nonnegative income or value observations. Economic Value Added Calculator Calculate economic value added from NOPAT, invested capital, and a supplied cost of capital. Free Cash Flow to Equity Calculator Estimate free cash flow to equity from net income, noncash expense, capital expenditure, working-capital change, and net borrowing. Cobb-Douglas Production Function Calculator Calculate output from total-factor productivity, capital, labor, and supplied production elasticities. Inflation-Adjusted Future Price Calculator Project a current price forward by a user-supplied annual inflation rate and number of years. Inflation-Adjusted Purchasing Power Calculator Estimate the present purchasing power of a future amount under a user-supplied inflation assumption. Time-Weighted Return Calculator Compound a sequence of period returns and calculate the cumulative and annualized result. Investment CAGR Calculator Calculate total return and compound annual growth rate from starting value, ending value, and holding years. Annualized Volatility Calculator Estimate annualized volatility from a list of periodic decimal returns. WACC Scenario Calculator Calculate WACC from market-value weights, required equity return, debt cost, and a visitor-supplied tax rate. After-Tax Return Scenario Calculator Apply a visitor-supplied tax rate to a pre-tax return and show the resulting tax drag. Break-Even Revenue Calculator Calculate revenue required to cover fixed costs when variable costs are entered as a share of revenue. Gross Profit from Margin Calculator Calculate gross profit and cost of goods sold from revenue and a user-supplied gross-margin rate. Operating Cost Share Calculator Calculate operating expenses as a share of revenue and show the amount remaining before other items. Rent-to-Income Ratio Calculator Calculate monthly rent as a share of monthly income and show income remaining before other costs. Housing Payment to Income Ratio Calculator Calculate a planned housing payment as a share of gross monthly income. Loan-to-Value Ratio Calculator Calculate loan-to-value percentage and property equity from a loan amount and property value. Dividend Yield Calculator Calculate annual dividend per share as a percentage of a share price. Earnings Yield Calculator Calculate earnings per share as a percentage of share price. Book Value per Share Calculator Calculate common-equity book value per share after subtracting preferred equity. Market Capitalization Calculator Calculate a company’s equity market capitalization from share price and shares outstanding. Enterprise Value Calculator Calculate a simple enterprise value from market capitalization, debt, and cash. Free Cash Flow Yield Calculator Calculate free cash flow as a percentage of market capitalization. Price-to-Earnings Ratio Calculator Calculate a share price multiple from share price and positive earnings per share. Black-Scholes Option Value Calculator Estimate a European call or put option value from price, strike, time, volatility, rates, and dividend yield. Bond Yield to Maturity Calculator Estimate the annual yield to maturity that equates a coupon bond's future cash flows with its current price. Vehicle Lease Payment Scenario Calculator Estimate a lease payment from capitalized cost, residual value, money factor, term, and a visitor-entered tax rate. Cash-Out Refinance Scenario Calculator Estimate a new mortgage payment and loan-to-value ratio when refinancing an existing balance and taking out cash. Credit Card Minimum Payment Scenario Calculator Estimate a credit-card minimum payment, monthly interest, principal reduction, and next balance from visitor-entered terms. Covered Interest Currency Forward Scenario Estimate a theoretical currency-forward rate from spot rate, two interest rates, and time to delivery. Debt Avalanche Payoff Planner Simulate three debts using minimum payments plus extra cash directed to the highest-rate balance first. Debt Consolidation Payment Scenario Compare three existing debt minimums with a new consolidated fixed-rate payment and total interest estimate. Debt Snowball Payoff Planner Simulate three debts using minimum payments plus extra cash directed to the smallest balance first. Deferred Annuity Present Value Calculator Estimate today's value of equal annuity payments that begin after a stated deferral period. Earned Value Management Calculator Calculate schedule and cost variances, performance indices, and a simple estimate at completion from project values. Forward Premium or Discount Calculator Calculate the annualized premium or discount implied by a forward price relative to a spot price. Implied Forward Interest Rate Calculator Calculate the annualized forward rate implied by two annual spot rates and two maturities. Futures Contract Profit and Margin Scenario Calculate a long or short futures position's price-change profit or loss and return on entered initial margin. GDP Gap Calculator Calculate the output gap between actual and potential gross domestic product. Minimum-Variance Hedge Ratio Calculator Estimate a hedge ratio from correlation, spot volatility, futures volatility, and exposure size. Herfindahl-Hirschman Market Concentration Calculator Calculate a partial-market HHI from entered percentage shares, including an explicit other-firms share. High-Low Cost Estimation Calculator Estimate variable cost per activity unit and fixed cost from high and low cost observations. Holding Period Return Calculator Calculate total holding-period return from beginning value, ending value, income, and fees. Constant-Product Impermanent Loss Calculator Estimate the relative value difference between a constant-product liquidity position and holding the two assets after a price-ratio change. Accumulated Depreciation Calculator Estimate straight-line depreciation accumulated over an elapsed portion of an asset's useful life and show its remaining book value. Actual Cash Value Scenario Calculator Estimate a simple actual-cash-value scenario by reducing a replacement cost by an entered depreciation percentage. AFFO Scenario Calculator Estimate adjusted funds from operations from FFO, entered non-cash adjustments, recurring capital spending, and straight-line rent adjustments. Customer Acquisition Cost Calculator Calculate customer acquisition cost from marketing spend, sales spend, and the number of newly acquired customers. Days Sales Outstanding Calculator Estimate how many days of credit sales are represented by average accounts receivable. Debt-to-Capital Ratio Calculator Calculate debt as a percentage of the entered debt-plus-equity capital structure. Debt-to-Equity Ratio Calculator Calculate the relationship between entered liabilities or debt and owners' equity. Defensive Interval Ratio Calculator Estimate how many days a business could cover entered daily cash operating expenses using liquid assets and receivables. Direct Material Price Variance Calculator Calculate the favorable or unfavorable price variance from actual and standard material prices and actual quantity. DuPont ROE Analysis Calculator Break return on equity into profit margin, asset turnover, and equity multiplier components. EBITDA Margin Calculator Calculate EBITDA as a percentage of revenue and show the entered operating cash-style amount before the excluded items. EV-to-EBITDA Multiple Calculator Calculate a simple enterprise-value multiple from entered enterprise value and EBITDA. Economic Profit Calculator Estimate economic profit by subtracting a capital charge from entered NOPAT. Fixed Asset Turnover Calculator Calculate net sales generated per unit of average net fixed assets. Gross Margin Return on Investment Calculator Estimate gross margin return on inventory investment from gross margin dollars and average inventory. Interest Coverage Ratio Calculator Calculate how many times entered EBIT covers an entered interest expense. Liquidity Coverage Ratio Scenario Calculator Calculate a simplified liquidity coverage ratio from high-quality liquid assets, gross outflows, and capped inflows. Loss Given Default Calculator Estimate loss given default and loss amount from exposure at default and an entered recovery-rate assumption. Levered Free Cash Flow Scenario Calculator Estimate cash flow available after operating needs, capital spending, working-capital changes, and net debt financing. Maximum Drawdown Scenario Calculator Calculate the percentage decline and recovery amount between an entered peak value and a later trough value. Quick Ratio (Acid-Test) Calculator Measure short-term liquidity using cash, short-term investments, and accounts receivable against current liabilities. Information Ratio Calculator Compare a portfolio's active return with its tracking error to estimate return per unit of active risk. Cross-Price Elasticity of Demand Calculator Estimate how the demand for one product changes when the price of another product changes, using the midpoint method. Basic Earnings per Share Calculator Calculate basic earnings per share from net income, preferred dividends, and weighted-average common shares. After-Repair Value Screening Calculator Estimate a transparent after-repair value range from three entered comparable sales and market-supported adjustments. Jensen's Alpha Calculator Compare an entered portfolio return with the return implied by a risk-free rate, market return, and portfolio beta. Treynor Ratio Calculator Calculate excess portfolio return per unit of systematic market risk using portfolio beta. Sortino Ratio Calculator Calculate a downside-risk-adjusted return from a comma-separated series of periodic returns and a target return. Weighted Portfolio Beta Calculator Estimate portfolio beta by weighting the entered individual holding betas, with automatic transparent normalization. Working Capital Turnover Ratio Calculator Calculate revenue generated per average working-capital unit from beginning and ending current-asset and current-liability balances. Occupancy Rate Calculator Calculate occupied and vacant shares from occupied units and the available-unit base for a property, facility, room set, or capacity plan. Net Effective Rent Calculator Spread free rent and one-time concessions across a lease term while keeping recurring fees visible in the comparison. Prorated Rent Calculator Calculate a partial-period rent charge from full-period rent, the selected day count, and the number of days charged. Income Elasticity of Demand Calculator Measure how quantity demanded changes relative to income using midpoint percentage changes between two observations. Lerner Index Calculator Calculate the price-cost markup as a share of price from an entered price and marginal cost. CAPM Expected Return Calculator Estimate an asset's required or expected return from a risk-free rate, beta, and market return using the capital asset pricing model. Sharpe Ratio Calculator Calculate a historical Sharpe ratio from periodic returns, a same-period risk-free rate, and population standard deviation of excess returns. Price Elasticity of Demand Calculator Measure the midpoint percentage response of quantity demanded to a price change between two observations. Gross Margin Calculator Calculate gross profit, gross margin, and markup on cost from revenue and cost of goods sold. Operating Margin Calculator Calculate operating income and operating margin after cost of goods sold and entered operating expenses. Return on Capital Employed Calculator Estimate ROCE from operating profit and the average of beginning and ending capital employed. Return on Invested Capital Calculator Calculate ROIC from EBIT, an entered tax assumption, and average beginning and ending invested capital. WACC Capital Cost Calculator Estimate WACC from debt and equity values, their costs, and an explicit user-entered tax assumption. Sustainable Growth Rate Calculator Estimate a stable-policy growth rate from return on equity and the share of earnings retained in the business. Total Asset Turnover Calculator Calculate net sales generated per average total-asset unit using beginning and ending asset balances. 28/36 Housing Affordability Guideline Calculator Compare a monthly housing cost and other debt with the 28% housing and 36% total-debt planning benchmarks. 3× Rent Income Screening Calculator Compare gross monthly income with a common three-times-rent screening benchmark and show the reverse rent share. Combined Loan-to-Value (CLTV) Calculator Calculate the combined loan-to-value ratio from property value and multiple debts secured by the property. Consumer Surplus Triangle Calculator Estimate consumer surplus from a maximum willingness to pay, market price, and purchased quantity under a straight-line demand model. Disposable Income After Deductions Calculator Subtract visitor-entered taxes and mandatory deductions from gross income for a clear disposable-income estimate. Discretionary Income After Essentials Calculator Estimate money left after entered taxes, mandatory deductions, and essential living expenses. Early Retirement Savings Target Calculator Build a transparent retirement scenario from a target age, spending gap, savings, return, and visitor-supplied withdrawal rate. Enterprise Value to Sales (EV/Sales) Calculator Calculate enterprise value and the EV-to-sales valuation multiple from market capitalization, debt, cash, and annual sales. Bradford Factor Absence Score Calculator Calculate a descriptive Bradford Factor score from absence instances and total absence days. Capital Gains Yield Calculator Estimate net capital gain or loss and its yield on an entered purchase price after transaction costs. Cost per Action (CPA) Calculator Calculate advertising cost per action and compare it with contribution per conversion and campaign results. EBIT Calculator Estimate earnings before interest and taxes by adding entered interest and income-tax adjustments back to net income. Earnings Before Tax (EBT) Calculator Calculate pre-tax earnings by adding income-tax expense or benefit back to net income. Effective Corporate Tax Rate Calculator Calculate an accounting effective tax rate from pre-tax income and entered income-tax expense or benefit. Consulting Project Fee Calculator Estimate a consulting project fee from billable hours, direct expenses, overhead, and a target profit margin. Dividend per Share Calculator Calculate dividend per share and annualized distributions from a payment amount, shares outstanding, and payment schedule. Cell Phone Plan Cost Comparison Calculator Compare two phone plans using recurring service, device, add-on, one-time fees, and a chosen comparison period. Trailing Twelve Months (TTM) Calculator Sum twelve consecutive monthly financial values and compare the latest six months with the preceding six months. Put–Call Parity Calculator Check the no-arbitrage relationship between European call and put premiums, the underlying price, strike, rates, dividends, and time to expiry. Pre-Money and Post-Money Valuation Calculator Calculate post-money valuation, investor ownership, and existing-owner dilution from a pre-money valuation and new investment. Lump Sum plus Monthly Investment Growth Calculator Project the future value of an initial lump sum combined with equal end-of-month contributions under a nominal annual return compounded monthly. FIFO Inventory Costing Calculator Calculate cost of goods sold and ending inventory value from inventory layers consumed in first-in, first-out order. Graham Number Screening Calculator Calculate the classic Graham-number screening value from positive earnings per share and book value per share. Currency Carry Trade Scenario Calculator Estimate the base-currency result of borrowing one currency, investing the converted amount at another rate, and applying a future exchange rate. HR Software ROI Calculator Estimate first-year return on investment and payback time from labor savings, software cost, and implementation cost. Gold Melt Value Calculator Estimate the melt value of gold from weight, purity, fine-gold price, and an optional buyer discount. Streaming Royalty Scenario Calculator Model an entered stream count and effective rate as a transparent scenario, then apply rights-holder share, distributor fees, and other deductions. Business Budget Balance Calculator Combine operating income streams, non-operating receipts, one-time setup costs, salaries, and recurring expenses into a transparent business-period budget. Deadweight Loss Triangle Calculator Estimate the triangular welfare loss from a price change and quantity change under a linear supply-and-demand approximation. Financial Leverage Ratio Calculator Calculate total assets, implied liabilities, the assets-to-equity leverage ratio, and the liabilities share from a simple balance-sheet snapshot. Free Cash Flow to Firm (FCFF) Calculator Estimate FCFF from net income, EBIT, EBITDA, or operating cash flow while keeping the tax shield and reinvestment inputs visible. Acquisition Goodwill Calculator Estimate goodwill or a bargain-purchase amount from purchase consideration and the fair values of identifiable assets and liabilities. Fixed Deposit Maturity Calculator Compare simple and cumulative fixed-deposit maturity, interest earned, effective yield, and average interest per period without assuming a country-specific bank rule. Price-to-Book Ratio Calculator Compare a share price with book value per share and show the implied market capitalization and book-equity scale. Price-to-Sales Ratio Calculator Calculate a price-to-sales multiple from share price, sales per share, and shares outstanding while keeping market value and sales scale visible. PEG Ratio Calculator Calculate a price-to-earnings multiple and divide it by an entered annual earnings-growth percentage to create a transparent PEG scenario. Unlevered Beta Calculator Remove an entered capital-structure effect from a levered beta using debt, equity, and an explicit tax-rate assumption. Net Debt Calculator Combine short-term debt, long-term debt, lease liabilities, cash, and short-term investments into a transparent net-debt scenario. Profitability Index Calculator Compare the present value of project benefits with present value of costs and report the profitability index and value surplus. Net Operating Income Calculator Estimate property net operating income from scheduled income, other operating income, vacancy loss, and operating expenses. Operating Cash Flow Ratio Calculator Compare operating cash flow with current liabilities and show the percentage coverage of the entered short-term obligation base. Net Operating Assets Calculator Calculate net operating assets from current and non-current operating assets and liabilities while keeping the operating boundary explicit. Real-Estate Commission Calculator Estimate a property-sale commission, an optional commission tax or VAT scenario, additional fees, and the seller proceeds before other closing items. Discounted Cash Flow (DCF) Scenario Estimate the present value of five forecast cash flows and a Gordon-growth terminal value, then compare the result with an initial investment. Finance Charge from a Payment Schedule Estimate the total scheduled finance charge from the amount financed, equal periodic payment, number of payments, and stated cash fees. Future Salary Growth Estimate Project an annual pay amount after repeated percentage increases or decreases, with a clear nominal-growth boundary. Pay Raise and New Pay Calculate the amount and new value of a one-time percentage pay raise for any stated pay period or currency unit. Price per Share and Enterprise-Value Bridge Translate equity value and basic or diluted shares into implied price per share, then show a simple debt-and-cash enterprise-value bridge. Stock Split and Reverse-Split Scenario Calculate post-split shares, price, dividend per share, and position value for a forward or reverse stock split ratio. Weighted Average Stock Cost Combine two share purchases and transaction fees to estimate total cost, average cost per share, current position value, and unrealized change. Investment Fee Drag Scenario Compare a fee-free compound-growth scenario with a simplified annual-fee scenario to show how recurring fees can reduce ending value. Sinking Fund Contribution Estimate the regular end-of-period contribution needed to reach a future target after accounting for an existing balance and periodic growth. Residual Income and Capital Charge Measure income left after applying a required return to an invested capital base, with the implied return and value spread shown together. Operating Asset Turnover Calculate revenue generated per unit of average operating assets and show the reciprocal asset intensity and days-equivalent view. Return on Ad Spend (ROAS) Compare attributed conversion value with advertising spend and optionally translate the result into gross-profit-after-ad-spend. LIFO Inventory Costing Calculator Use a periodic last-in, first-out layer worksheet to estimate ending inventory cost and cost of goods sold from beginning stock and two purchase layers. Insurance Loss Ratio Calculator Calculate incurred losses as a percentage of earned premium and show the same relationship as a ratio and simple premium-minus-loss amount. Vehicle Lease Mileage Overage Calculator Estimate contracted mileage, expected mileage, excess distance, and a possible end-of-lease mileage charge from the allowance and rate in a lease quote. Car Loan Refinance Comparison Calculator Compare the estimated payment and remaining repayment cost of a current vehicle loan with a new fixed-rate term that includes refinance fees. Modified Internal Rate of Return Calculator Estimate MIRR from a series of periodic cash flows by discounting negative flows at a finance rate and compounding positive flows at a reinvestment rate. Covered Interest Rate Parity Calculator Estimate a no-arbitrage forward exchange rate from a spot quote, domestic and foreign interest rates, term, and an observed forward scenario. Progressive Tax Bracket Calculator Estimate tax from three entered thresholds and four marginal rates, then show the effective rate, marginal rate, and income remaining. Gross-to-Net and Net-to-Gross Pay Calculator Convert a gross pay amount to net pay or solve for gross pay from a target net amount using entered percentage deductions and fixed deductions. Effective Annual Interest Rate Calculator Convert a nominal annual rate and compounding frequency into a periodic rate, effective annual rate, and compounding difference. Real Interest Rate Calculator Compare a nominal interest rate with an entered inflation rate using the exact Fisher relation and the simple nominal-minus-inflation approximation. Taxable-Equivalent Yield Calculator Convert a tax-exempt yield into the taxable yield that would leave the same after-tax return at an entered tax rate. GST and QST Calculator Estimate GST, QST, combined tax, and the after-tax amount with visitor-entered rates and a transparent choice of QST tax base. Mortgage Points Break-Even Calculator Estimate the upfront cost, monthly saving, and break-even time for mortgage points using the payment figures from a lender's offer. Mortgage Extra Payment and Interest-Saving Calculator Estimate how an extra monthly payment or one-time principal payment changes the payoff time and interest of a fixed amortizing loan. Safety Stock and Reorder Point Calculator Estimate demand variability during lead time, safety stock, and a variability-aware reorder point from demand and lead-time inputs. Lease Money Factor and APR Approximation Calculator Convert a vehicle lease money factor to an approximate annual percentage rate, or convert an entered rate back to a money factor for comparison. Website Advertising Revenue Calculator Estimate clicks, advertising revenue, revenue per thousand page views, and combined revenue from page views, click-through rate, and earnings per click. Mileage Reimbursement and Travel-Cost Calculator Estimate reimbursement, actual distance cost, and the difference between an entered travel rate and your own cost assumptions. Rental Property Cash-Flow and Yield Calculator Estimate effective rental income, operating cash flow, net operating income, cap rate, cash-on-cash return, and debt-service coverage from entered property assumptions. Mortgage Prepayment Penalty Scenario Calculator Compare common entered penalty methods—percentage of balance, months of interest, or fixed fee—with an optional contract cap. Earnest Money Deposit Calculator Calculate an earnest-money deposit from a purchase-price percentage or calculate its percentage from an entered deposit, then compare it with a planned down payment. Price per Square Meter Calculator Calculate property or land price per square meter and convert the result to price per square foot for international comparisons. Labor Productivity and Hours Calculator Calculate output per labor hour, total labor hours, and the hours required for a target output from entered workers, hours, and output assumptions. Forex Pip Value Calculator Calculate the value of one forex pip for a chosen lot size, contract unit, pip size, and account-currency conversion rate. Forex Pip Cost Calculator Estimate the account-currency cost of a chosen pip movement and compare one-way and simple round-trip scenarios. Forex Position Size Calculator Estimate a forex lot size from account equity, risk percentage, stop-loss distance, slippage allowance, and commission assumptions. Forex Margin and Leverage Calculator Estimate position notional, equivalent margin, margin rate, free equity, and margin usage from a forex position and leverage assumption. Forex Spread Cost Calculator Convert bid and ask prices into spread pips and estimate the account-currency cost of crossing that spread for a position. Trading Profit and Loss Calculator Estimate gross and net trading P&L for long or short positions using entry price, exit price, quantity, multiplier, conversion rate, and fees. Gold Weight and Melt Value Calculator Convert gold weight in grams, kilograms, or troy ounces into fine-gold content and an estimated metal value. Gold Futures Notional Value Calculator Estimate gold futures exposure, notional value, tick value, and an entered initial-margin scenario from price and contract size. Crude Oil Contract Notional Value Calculator Estimate crude-oil exposure, notional value, tick value, and an entered initial-margin scenario from price and barrels per contract. Trading Margin and Liquidation Scenario Calculator Estimate an illustrative maintenance threshold and liquidation price from entry, quantity, margin percentages, fees, equity, and direction. Buying Power and Margin Capacity Scenario Calculator Estimate margin excess and a transparent additional-notional scenario from equity, an existing position, reserve cash, and entered margin percentages. Call and Put Option Payoff Calculator Calculate a single call or put option's expiration payoff, premium effect, net result, and simple break-even for a long or short position. UK Capital Gains Tax Scenario Calculator Estimate UK-style capital gains tax by applying entered losses, annual exempt amount, unused basic-rate band, and two entered gain rates. US Child Tax Credit Scenario Calculator Estimate a US-style child tax credit scenario with entered child count, credit amount, income phaseout, tax liability, and refundable limits. Business Loan Payment and Cost Calculator Model a fixed-rate business loan with payment frequency, origination fee, and optional extra payment to see payoff time and total financing cost. GDP Deflator Calculator Calculate the implicit GDP deflator from nominal and real GDP while keeping the base-year index convention visible. Single-Sum Future Value Calculator Project one present amount forward with a stated annual rate, compounding frequency, and time period. Multi-Method Depreciation Calculator Compare straight-line, double-declining-balance, and sum-of-the-years-digits book depreciation for a depreciable asset. Credit Card Statement Interest Calculator Estimate one statement-period interest charge, fees, payment coverage, and remaining balance from a starting balance and APR. Free-Float Shares Calculator Estimate publicly available shares and the free-float percentage from shares outstanding and explicitly excluded holdings. Hourly Salary with Overtime Calculator Annualize regular and overtime hours into weekly, annual, monthly-average, and effective hourly gross pay without guessing local wage law. Interest-Only Mortgage Payment Screen Estimate the scheduled interest-only payment, interest paid during the interest-only period, and principal balance that remains when the period ends. EBITDA Reconciliation Calculator Reconcile EBITDA from net income, interest, income tax, depreciation, amortization, and revenue, then show the resulting margin. Liquid Net Worth Calculator Compare liquid assets with total liabilities, then contrast that liquidity view with total net worth after including illiquid assets. Deferred-Payment Loan Scenario Calculator Estimate the balance after a payment deferral and the later fixed payment under either capitalized interest or interest-paid-during-deferral assumptions. Debt-to-Income (DTI) Ratio Share of gross monthly income spent on debt payments, with a plain-English risk verdict. Net Worth Assets minus liabilities, with both sides of the balance shown. 50/30/20 Budget Split Split after-tax income into needs, wants, and savings at 50/30/20. Loan Comparison (A vs B) Monthly payments for two loan scenarios side by side. IRR Estimate Internal rate of return from a cash-flow series. Dividend Payout Ratio Calculator Calculate dividend payout and retention ratios from dividends and net income for one period. Down Payment Calculator Estimate down payment, closing costs, upfront cash, and amount financed from transparent percentages. Loan Interest Rate Calculator Solve a fixed loan's nominal and effective annual rate from principal, payment, and whole-month term. Credit Card Payoff Calculator Estimate payoff time and interest for a fixed monthly payment and APR. Required Minimum Distribution Estimate Estimate an original owner's IRA RMD using the IRS Uniform Lifetime Table for ages 73 and older. Certificate of Deposit Calculator Estimate CD maturity value and interest from principal, APY, term, and compounding frequency. House Affordability Calculator Estimate a planning price from income, debts, down payment, housing ratio, rate, and taxes or insurance. Payback Period Calculator Estimate simple and discounted payback from an initial investment and ordered annual cash flows. Rent Affordability Estimate Estimate a rent guideline from gross income, an entered target percentage, and monthly debt payments.

Flooring Area and Waste Calculator Estimate rectangular floor area, planned waste, order area, and package count. Paint Quantity Calculator Estimate paint volume and whole-can count from surface area, coats, coverage, and can size. Concrete Volume Calculator Estimate rectangular concrete volume with an explicit waste allowance. Air-Conditioning Tonnage Estimate Estimate nominal cooling tons from a cooling load stated in BTU per hour. Carpet Quantity Calculator Estimate net floor area and carpet quantity after an entered waste allowance. Asphalt Volume and Mass Calculator Estimate asphalt volume and mass for a rectangular paving area with a waste allowance. Brick Quantity Calculator Estimate the number of rectangular brick faces needed for a wall after an entered waste allowance. Concrete Weight Calculator Estimate concrete mass from volume and an entered density. Elevation Grade Calculator Calculate slope grade percentage and angle from vertical rise and horizontal run. Floor Area Ratio Calculator Calculate floor area ratio from total building floor area and site area. Air Changes to CFM Calculator Estimate cubic feet per minute from room volume and desired air changes per hour. Rectangular Fence Length Calculator Calculate the perimeter of a rectangular enclosure and add an optional waste allowance. Board and Batten Wall Estimate Estimate board count, batten count, and covered wall area for a rectangular board-and-batten surface with a waste allowance. Deck Board Quantity Calculator Estimate deck board count and material area from deck dimensions, board width, gap, and waste allowance. French Drain Trench Volume Calculator Estimate trench volume, pipe length, and drainage-rock volume from rectangular trench dimensions and a rock-fill fraction. Air Changes per Hour Calculator Calculate air changes per hour from room volume and average ventilation flow, with metric and cubic-foot outputs. Circular Arch Opening Calculator Calculate the radius, opening area, and curved arch length from a circular-segment opening width and rise. Aluminum Plate Weight Calculator Calculate the volume and estimated weight of a rectangular aluminum plate from dimensions and density. Baluster Count and Spacing Calculator Estimate the number of balusters needed to keep equal clear gaps below a selected maximum across an opening. Bolt Circle Layout Calculator Calculate radius, angular spacing, and the first bolt coordinate for a regular bolt circle. Bolt Torque from Force Calculator Calculate torque from applied force, lever-arm length, and the angle between them. Open Belt Length Calculator Estimate the length of an open belt from pulley diameters and center distance using a standard approximate geometry relation. Concrete Column Volume and Weight Calculator Calculate volume and estimated weight for a cylindrical concrete column from diameter, height, and density. Concrete Driveway Cost Estimate Estimate concrete volume, order volume with waste, and material cost for a rectangular slab. Crushed Stone Quantity Calculator Estimate crushed-stone volume and mass for a rectangular area from dimensions, depth, density, and waste allowance. Board-on-Board Fence Board Calculator Estimate overlapping fence board count and covered area from fence length, board width, overlap, height, and waste allowance. Concrete Stair Geometry Calculator Calculate total rise, total run, slope angle, and approximate concrete volume for equal rectangular stair steps. Deck Stain Quantity Calculator Estimate stain volume from deck area, coverage rate, number of coats, and a waste allowance. Epoxy Resin Quantity Calculator Estimate epoxy volume and mass from surface area, pour thickness, density, and waste allowance. Concrete Block Wall Quantity Calculator Estimate concrete masonry units from wall area, block face dimensions, and a waste allowance. Concrete Tube Volume and Weight Calculator Calculate volume and estimated mass for a cylindrical concrete tube from diameter, height, and density. Simple Shed Material Cost Calculator Estimate a simple shed material budget from floor area, wall area, roof area, unit prices, and a waste allowance. Copper Wire Weight Calculator Calculate cylindrical copper wire volume and estimated mass from length, diameter, and density. Clearance Hole Diameter Calculator Calculate a simple clearance-hole diameter by adding a selected installation margin to a fastener diameter. Floor Joist Count and Spacing Calculator Estimate joist count and actual equal spacing for a floor length and selected maximum spacing. Tile Grout Volume Calculator Estimate grout volume from tile area, joint dimensions, tile dimensions, and a visible waste allowance. Fence Picket Count Calculator Estimate picket count and face area from fence length, picket width, gap, height, and waste allowance. Miter Angle from Corner Angle Calculator Calculate equal miter-cut angles for a symmetric joint from the total corner angle. Glass Panel Weight Calculator Estimate a rectangular glass panel's area, volume, and mass from dimensions, thickness, and density. Room Cooling Load Planning Calculator Estimate a simple air-conditioner cooling capacity from room area, a base load, and occupants. Angle of Depression Calculator Calculate the downward viewing angle from an observation height and horizontal distance. Spherical Bowl Segment Volume Calculator Estimate the volume of a spherical-cap bowl from sphere radius and cap depth. Fuel Carbon Dioxide Equivalent Calculator Estimate carbon-dioxide mass from fuel mass, carbon fraction, and an oxidation fraction. Cement Bag Quantity Estimate Estimate cement mass and bags from concrete volume, cement fraction, cement density, and bag size. Cubic Metre to Cubic Yard Calculator Convert a volume in cubic metres to cubic yards and back using the exact SI-to-US customary volume factor. Fence Post Embedment Planning Calculator Estimate underground fence-post depth from post height and a selected embedment fraction. Fence Stain Quantity Calculator Estimate stain volume from fence face dimensions, number of coats, coverage, and waste allowance. Room Heating Load Planning Calculator Estimate a simple furnace heating capacity from room area, base load, climate factor, and occupants. Flow Rate in Gallons per Minute Calculator Calculate a volumetric flow rate from volume and elapsed time and report litres per minute. Gravel Driveway Quantity Calculator Estimate gravel volume and mass from driveway dimensions, bulk density, and waste allowance. Surface Heat Loss Calculator Estimate conductive heat flow through an area from U-value and indoor-outdoor temperature difference. Euler Buckling Critical Load Calculator Estimate the ideal Euler critical load for a slender column from length, stiffness, end-condition factor, and second moment of area. Thin-Walled Hoop Stress Calculator Estimate circumferential hoop stress in a thin-walled cylindrical pressure vessel from pressure, radius, and wall thickness. Mohr’s Circle Plane-Stress Calculator Calculate the center, radius, principal stresses, and maximum in-plane shear stress for a plane-stress state. Birdsmouth Cut Planning Calculator Estimate a rafter seat-cut length from roof pitch, rafter depth, and a user-selected cut-depth fraction. Boiler Heat-Load Planning Calculator Estimate a nominal boiler input from heated volume, design temperature rise, heat-loss factor, and efficiency. Electrical Box Fill Planning Calculator Estimate required box volume from conductor, device, ground, and internal-clamp allowances supplied by the user. Chicken Coop and Run Size Planner Estimate coop floor area and outdoor run area from flock size and user-selected space allowances. Concrete Block Wall Fill Estimate Estimate block count, gross wall volume, and a user-defined void-fill volume for a block wall. Concrete Cylinder Volume Calculator Calculate concrete volume for one or more cylindrical footings, posts, or forms with a waste allowance. Concrete Slab Quantity Calculator Estimate slab concrete volume, cubic yards, and a waste-adjusted order quantity from length, width, and thickness. Countersink Depth Calculator Calculate a conical countersink depth from screw-head diameter, body diameter, and included angle. DIY Shed Cost Planning Calculator Estimate a simple shed project cost from floor, wall, and roof areas with separate material rates and waste. Door Header Length Planning Calculator Calculate a preliminary header cut length from opening width, bearing on each side, and a cutting allowance. Square Feet and Depth to Cubic Yards Calculator Convert an area in square feet and a material depth in inches into cubic yards with waste. Gallons per Square Foot Depth Calculator Convert a liquid volume spread over an area into an equivalent depth and surface loading. Gambrel Roof Surface Area Calculator Estimate two-sided gambrel roof surface area from building length and the two roof-slope segments. Round Hole Excavation Volume Calculator Estimate soil or concrete volume for repeated cylindrical holes from diameter, depth, count, and waste. Hoop House Cover and Volume Calculator Estimate cover area and interior volume for a semicylindrical hoop-house frame with optional base-wall height. Insulation Thickness and Volume Calculator Estimate insulation thickness, material volume, and waste from target R-value, conductivity, and surface area. Ladder Angle and Length Calculator Calculate the ladder angle and required ladder length from wall height and base distance. Landscape Rock Weight and Volume Calculator Estimate decorative rock volume, mass, and tonnes from area, depth, density, and waste. Liters per Minute Flow Calculator Calculate metric flow rate from a collected volume and elapsed time, with optional cubic-metre-per-hour output. Round Log Weight Calculator Estimate a cylindrical log's volume and mass from diameter, length, wood density, and a moisture allowance. Fence Material Cost Calculator Estimate fence face area, posts, rails, and material cost from dimensions, spacing, and entered unit prices. Fire-Flow Pressure Estimate Estimate a nominal fire-flow rate from a supplied flow coefficient and residual pressure without pretending to perform a code hydraulic design. Wall Stud Framing Calculator Estimate stud count, gross stud length, and plate length for a straight framed wall with optional openings. Minor-Loss K-Factor Calculator Calculate head loss and pressure loss from a fitting K-factor, flow velocity, fluid density, and gravity. Lumber Weight Calculator Estimate the mass of rectangular lumber pieces from dimensions, count, and an entered bulk density. Masonry Mortar Volume Calculator Estimate net mortar volume for a straight masonry wall from wall dimensions, unit dimensions, joint thickness, and waste. Paver Base and Sand Calculator Estimate base aggregate volume, bedding-sand volume, and sand mass for a rectangular paver area. Pipe Weight Calculator Estimate hollow-pipe volume and mass from outside diameter, wall thickness, length, count, and density. Post-Hole Concrete Calculator Estimate concrete volume and order volume for cylindrical post holes from count, diameter, depth, fill fraction, and waste. Sheet-Metal Punching Force Calculator Estimate the force needed to shear a perimeter through sheet material from perimeter, thickness, shear strength, and a safety factor. Rafter Length Calculator Estimate sloping rafter length, roof angle, and total material length from horizontal run, rise, overhang, and count. Rebar Weight and Length Calculator Estimate total reinforcing-bar length, steel volume, and mass from bar diameter, cut length, count, density, and lap allowance. Rivet Shear Diameter Calculator Estimate a circular rivet diameter from design load, rivet count, shear planes, allowable shear stress, and a planning factor. Rolling Pipe Offset Calculator Calculate travel and advance for a two-dimensional rolling pipe offset from offset distance and bend angle. Tapered Retaining-Wall Material Calculator Estimate volume and mass for a straight tapered wall from length, height, top thickness, base thickness, density, and waste. Ramp Slope and Length Calculator Calculate ramp slope as a ratio, percentage, and angle from a measured rise and horizontal run, with the sloped length shown separately. Spindle Speed and Feed Rate Calculator Estimate spindle RPM and a basic milling feed rate from surface speed, tool diameter, flute count, and chip load. Thread Pitch and Lead Calculator Convert threads per inch into inch and millimeter pitch, then calculate lead for single-start or multi-start threads. Parabolic Vertical Curve Calculator Estimate grade change, K value, grade, and elevation at a station on a simple parabolic vertical alignment. Spiral Staircase Geometry Calculator Estimate step count, actual rise, angular tread width, and walking-line arc for a spiral staircase from entered geometry. Vinyl Siding Quantity Calculator Estimate net wall area, order area, and siding panel count from wall dimensions, openings, panel coverage, and waste allowance. Riprap Volume and Mass Calculator Estimate riprap volume, order mass, tonnes, and bag count from a rectangular layer and entered bulk density. Round Pen Area and Panel Calculator Calculate the area and circumference of a circular pen, subtract a gate opening, and estimate whole panel count with an allowance. Metal Roof Area and Cost Calculator Estimate sloped gable-roof surface area, order area, and material-only cost from building dimensions, slope geometry, waste, and a local unit price. Stair Carpet Area and Roll-Length Calculator Estimate carpet surface area and linear roll length for a straight stair run from step count, tread, riser, width, landing, and waste. Cable Sag and Tension Calculator Estimate midspan sag, vertical support reaction, approximate support tension, and support angle for a uniformly loaded cable using a parabolic approximation. Concrete Form Tube Volume Calculator Estimate concrete volume for repeated cylindrical form tubes and convert the order volume into liters and whole bags using an entered bag yield. Thinset Mortar Quantity Calculator Estimate thinset volume, mortar mass, and whole bag count from tiled area, bed thickness, entered dry density, and a transparent allowance. Joint Sealant Cartridge Calculator Estimate sealant volume and whole cartridges from joint length, joint width, joint depth, cartridge volume, and a visible handling allowance. Shiplap Board Quantity Calculator Estimate net wall area, order area, and whole shiplap board count using usable board width, board length, openings, and a waste allowance. Pond Water Volume and Liner Calculator Estimate rectangular pond water volume, liner footprint, and allowance-adjusted liner area from plan dimensions, average depth, and edge overlap. Cylindrical Tank Volume Calculator Calculate full and partially filled cylindrical tank volume from diameter, tank length or height, and a chosen fill percentage. Rectangular Metal Stock Weight Calculator Estimate the mass and tonnes of rectangular metal stock from length, width, thickness, density, and piece count. Milling Material Removal Rate Calculator Calculate milling material removal rate, removed volume over a pass, and idealized cutting time from width, depth, feed rate, and pass length. Taper Angle and Ratio Calculator Calculate diameter change, taper per length, one-in ratio, half-angle, included angle, and slanted edge length from two diameters and a taper length. Fire-Pit Glass Quantity Calculator Estimate the volume, mass, and whole-unit count of fire glass for an annular fire-pit bed from inner and outer diameters, depth, density, and an allowance. Flooring Box Quantity Calculator Estimate net floor area, order area, and whole boxes of flooring from room dimensions, openings, package coverage, and waste. Rectangular Pool Volume and Fill-Cost Calculator Estimate rectangular pool water volume, liters, and a scenario fill cost from length, width, average depth, fill percentage, and entered water price. Round Pool Volume and Fill-Cost Calculator Estimate circular pool water volume, liters, and a scenario fill cost from diameter, average depth, fill percentage, and entered water price. Roof Snow Load Force Calculator Convert an entered snow pressure, roof plan area, and scenario factor into total roof snow force without selecting a jurisdictional design load. Planar True-Position Deviation Calculator Calculate diametral planar true-position deviation from measured X and Y offsets and optionally compare it with an entered tolerance. Wainscoting Panel Quantity Calculator Estimate net wall coverage, panel count, and top-rail length from wall dimensions, openings, panel size, and a cutting allowance. Welding Heat Input Calculator Estimate welding heat input per unit length from current, voltage, travel speed, and an entered efficiency factor. Square Meter Area Converter Convert an area entered in square meters to square feet, square yards, square centimeters, and acres using explicit area factors. Square Yard Area Converter Convert an area entered in square yards to square feet, square meters, square inches, and acres using international-unit relationships. Paver Quantity Calculator Estimate the number of equal-size pavers for a rectangular area using the installed footprint, joint gap, and waste allowance. Plywood Sheet Quantity Calculator Estimate how many rectangular plywood sheets cover a project area, including a selectable cutting and waste allowance. Board Foot Lumber Calculator Calculate board feet, cubic feet, and cubic metres from lumber thickness, width, length, and piece count. Miter Angle Calculator Find the equal miter cut angle for a two-piece joint from the included corner angle, with the complementary saw reference shown separately. Spindle Spacing Calculator Estimate the minimum number of equal spindles needed to keep an entered clear gap at or below its planning limit. Gear Pitch Diameter Calculator Calculate a gear's pitch diameter, circular pitch, module, and angular tooth pitch from tooth count and diametral pitch. Siding Quantity Calculator Estimate net wall area, waste-adjusted siding area, and panel or package count from wall dimensions and product coverage. Wood Beam Span Screening Calculator Screen a simply supported rectangular beam under a uniform load using entered elastic modulus, allowable bending stress, and deflection ratio. Steel Plate Weight Calculator Estimate steel plate volume, mass, and gravitational weight from dimensions, density, and local gravitational acceleration. Wall Surface Area Calculator Find gross wall area, subtract measured door and window openings, and report the usable wall surface for paint, panels, or wall covering. Roof Shingle Bundle Calculator Estimate sloped roof area, 100-area-unit roofing squares, shingle bundles, and individual shingles from plan dimensions and product coverage. Roof Truss Count and Cost Calculator Estimate how many evenly spaced roof trusses span a roof length and calculate a transparent material-plus-installation budget. Square Yards Area and Cost Calculator Convert a rectangular measured area from common length units into square yards and estimate a price per square yard. Tile Quantity and Box Cost Calculator Estimate rectangular tiles, boxes, and material cost from surface dimensions, tile size, grout gap, and a visible waste allowance. Aggregate Tonnage Calculator Estimate aggregate volume, order tonnage, and material cost from a rectangular area, depth, unit weight, and allowance. Wallpaper Roll and Drop Calculator Estimate wallpaper drops and whole rolls from the wall run, ceiling height, roll dimensions, pattern repeat, trimming allowance, and a deliberate spare-roll choice. Privacy Fence Board and Post Planner Plan overlapping privacy-fence boards, sections, posts, rails, and post length from a fence run, gates, overlap, and spacing assumptions. Spaced Wood Fence Materials Calculator Estimate spaced pickets, sections, posts, rails, post length, and covered face area from a wood-fence layout with a visible gap between boards. Vinyl Fence Panel and Post Calculator Estimate vinyl fence panels, posts, caps, and leftover panel coverage from a run, panel length, gate openings, and an explicit allowance. Vinyl Fence Cost Scenario Calculator Estimate vinyl panel, post, gate, and installation scenario costs from a measured run and visitor-supplied prices in any currency. Rectangular Cuboid Mass and Weight Calculator Calculate a rectangular cuboid's volume, mass, gravitational weight, and specific weight from dimensions, density, and gravity. Material Roll Length Calculator Estimate the length of tightly wound sheet, film, tape, paper, or fabric from outer diameter, core diameter, and material thickness. Paint Quantity and Coverage Calculator Estimate paint needed for a measured surface, selected coats, product coverage, waste allowance, and whole container sizes. Junction Box Straight and Angle Pull Sizing Calculator Estimate a planning envelope for horizontal and vertical straight-pull and angle-pull raceway rows using the entered 8× and 6× rules plus other-entry sums. Sod Quantity and Cost Calculator Estimate lawn area, waste-adjusted coverage, sod pieces to order, leftover coverage, and material cost from measured lawn and piece dimensions. Road Base Material Quantity Calculator Estimate compacted volume, order volume, aggregate mass, tonnes, and truckloads for a road or driveway base layer from explicit dimensions and density assumptions. Aquarium Glass Thickness Screening Calculator Estimate a simplified water-panel glass thickness from water depth, plate coefficient, material strength, safety factor, and water properties while keeping the engineering boundary visible.

Travel Fuel Cost Estimator Estimate fuel needed and trip cost from distance, consumption, and fuel price, with explicit units. Weekly Budget Planner Split a total budget evenly across a whole number of weeks to plan weekly spending. Tip and Bill Split Add a tip percentage and split the total evenly across diners. Recipe Scaler Scale any ingredient quantity between serving sizes. Unit Price Comparer Compare two pack prices by cost per unit weight or volume. Paint Estimator Gallons needed from paintable area, coats, and coverage per gallon. Running Pace and Speed Pace per kilometre or mile plus average speed from distance and time. Concrete Bags Estimator Bags of premix from slab volume and per-bag yield. Mulch and Soil Volume Cubic yards from bed area and depth, plus bag count. Fuel Cost Estimate Estimate fuel volume and cost from trip distance, fuel economy, and the price you enter. Tip, Tax, and Bill Split Calculator Calculate an entered tip and tax amount, total bill, and equal share per person. Audiobook Playback Time Calculator Calculate adjusted listening time and time saved when playback speed changes. Battery Charge Time Calculator Estimate charging time from battery capacity, charger current, and a charging-efficiency allowance. Flight Carbon Dioxide Estimate Estimate flight carbon dioxide from distance, fuel use, emission factor, and passenger count supplied by the user. Appliance Energy Cost Calculator Estimate energy use and cost from appliance power, operating time, days, and an entered electricity price. Classroom Space per Person Calculator Calculate floor area per person and total capacity from room dimensions and a chosen spacing allowance. Bathroom Mirror Width Calculator Calculate a maximum mirror width from vanity width and selected side clearances, plus mirror area from height. Balloon Arch Quantity Calculator Estimate balloon count from an arch length, center-to-center balloon spacing, and an optional planning allowance. Bath Versus Shower Water Calculator Compare weekly water use from showers and baths using explicit duration, flow, frequency, and bath-volume assumptions. Rectangular Bag Capacity Calculator Calculate internal volume and approximate litre capacity for a rectangular bag from dimensions and fill percentage. Antipode Coordinate Calculator Calculate the opposite point on Earth from a latitude and longitude using a spherical coordinate convention. Binge-Watching Time Calculator Calculate total viewing time and adjusted time at a selected playback speed from episode count and duration. Travel Cost per Distance Calculator Calculate fuel cost per kilometre and total trip fuel cost from fuel economy, fuel price, and distance. Cost per Minute Calculator Calculate cost per minute and total cost from a charge and the duration it covers. Aquarium Volume Calculator Calculate rectangular aquarium volume in litres and usable water volume from dimensions and a fill percentage. Cleaning Service Cost Calculator Estimate cleaning cost from area, price per area unit, visit count, and an optional supply allowance. Boat Speed and Travel Time Calculator Calculate average boat speed and travel time from distance and the other selected time or speed input. Bed Area and Linen Size Calculator Calculate rectangular bed area and a minimum mattress-covering size from bed length, width, and side allowance. Commute Time and Cost Calculator Estimate commute time and fuel cost from one-way distance, trips per week, speed, fuel economy, and fuel price. Bean Bag Filling Volume Calculator Estimate fill volume for an ellipsoid-like bean bag from its three overall dimensions and a selected fill fraction. Cubic-Metre Shipping Volume Calculator Calculate total shipment volume in cubic metres from rectangular package dimensions and quantity. Circle Skirt Fabric Calculator Estimate the inner radius, cut radius, and fabric area for a full-, half-, or quarter-circle skirt from waist, length, and allowance inputs. Clay Shrinkage Calculator Estimate dried or fired clay dimensions and volume change from wet dimensions and a stated linear shrinkage percentage. Cross-Stitch Fabric Size Calculator Convert stitch counts and fabric count into stitched dimensions, cut dimensions, and approximate fabric area with a visible margin. Curtain Panel Quantity Calculator Estimate finished panel count, total cut width, and fabric area from a window width, fullness ratio, panel width, and drop. Fuel Distance Calculator Estimate travel distance from fuel volume and vehicle consumption, with the result shown in kilometres, miles, and kilometres per litre. Carpool Cost Calculator Estimate shared trip distance, fuel use, total fuel cost, and equal cost per passenger from route, schedule, vehicle consumption, and fuel price. Rectangular Container Loading Calculator Estimate how many identical rectangular boxes fit in a rectangular container for one selected axis-aligned orientation, with axis counts and volume utilization. Pallet Packing Layout Calculator Compare two axis-aligned package orientations on a rectangular pallet and estimate per-layer capacity, footprint utilization, and total boxes across layers. TV Mounting Height Geometry Calculator Estimate a screen's width, height, top, bottom, center position, and viewing angle from diagonal size, aspect ratio, eye height, and viewing distance. Garbage Bag Size Planner Estimate the minimum flat width and length of a liner for a rectangular bin, then add visible fitting allowances before checking a product label. Picture Frame and Mat Size Calculator Calculate a mat outer size, frame outer size, visible artwork area, mat area, and frame perimeter from artwork and border measurements. Paper Thickness and Stack Height Calculator Infer sheet caliper from a measured paper stack and project the height, inches, and sheets-per-inch for another sheet count. Paper Sheet Mass and Ream Weight Calculator Calculate the mass of paper sheets and a 500-sheet ream from grammage, sheet dimensions, and quantity. Quilt Binding Strip Calculator Estimate binding length, whole strips, fabric cut width, and unused strip length from quilt dimensions and a visible joining allowance. Desk Height Fit Calculator Compare entered seated and standing elbow heights with task offsets and desk adjustment ranges without claiming one universal ergonomic height. Diaper Supply Planner Estimate disposable diaper units and packs for a stated number of babies, days, daily changes, buffer, and package size. Cordwood Volume Calculator Convert a rectangular stacked firewood pile into cubic feet, standard cord equivalents, and an entered purchase estimate. Helium Balloon Lift and Quantity Calculator Estimate the lift of one spherical helium balloon and the number needed for a payload after accounting for envelope mass and a visible planning margin. Meeting Cost Calculator Estimate the direct and loaded cost of a meeting from participant time, preparation time, a local hourly rate, and an explicit overhead percentage. Microwave Wattage Time Adjustment Calculator Scale a package or recipe heating time between two microwave power ratings while keeping the label-time assumption visible. Recessed Lighting Layout Calculator Estimate a regular recessed-light layout from room dimensions, a maximum spacing, edge margin, target illuminance, fixture lumens, and utilization assumptions. Shower Water and Heating Cost Calculator Estimate shower water volume, heating energy, water cost, and energy cost from flow, duration, temperatures, efficiency, and local prices. Wheel Offset and Backspacing Calculator Convert measured wheel backspacing and advertised width into the approximate wheel offset, centerline, overall width, and outboard spacing. Winch Line Pull Planning Calculator Estimate the line pull for moving a mass up a slope from grade, rolling resistance, line efficiency, and a visible safety factor. Crosswind and Headwind Component Calculator Resolve a wind speed into runway-relative crosswind and headwind or tailwind components using a selectable speed unit. Novel Writing Pace Calculator Plan the daily writing pace needed to reach a word-count goal and compare it with a steady entered pace over the remaining days. Lawn Mowing Cost Scenario Calculator Estimate productive mowing time, total visit time, per-visit cost, and seasonal cost from lawn area, mower productivity, user-entered rates, and visit count. Pet-Sitting Visit Cost Scenario Calculator Estimate a pet-sitting invoice from visits, visit duration, base rate, extra-pet fees, travel fees, and one-time charges without claiming a universal local rate. Dog Crate Internal Size Planner Plan minimum internal crate dimensions from a dog's measured body length, standing height, turning diameter, and explicit comfort clearances. Dog Harness Measurement Planner Turn a dog's chest girth, neck girth, and back length into transparent measurement targets with user-entered fit clearances before comparing a manufacturer's size chart. Rabbit Enclosure Space Check Calculator Compare a rabbit enclosure's available floor area and height with visitor-entered welfare baselines and an additional-rabbit allowance. Aquatic Turtle Tank Volume Planner Estimate minimum water volume, litres, and water depth from shell length, turtle count, and editable care-rule factors. Metric Ring Size Planner Convert a measured inner circumference into diameter, inches, and an ISO-style numeric ring-size reference without hiding regional sizing differences. Shoelace Length Planning Calculator Estimate lace length from eyelet pairs, eyelet spacing, across-shoe width, lacing style, and the total allowance needed for tying. Pool Salt Addition Planner Estimate the mass of salt needed to move a pool from a measured concentration to a target concentration using litres, cubic metres, or US gallons. Reading Speed and Study Pace Calculator Calculate words per minute from a timed reading sample and estimate words, pages, or minutes for a study session using that measured pace. Cash Weight Estimator Estimate the total mass, face value, and value density of repeated cash items from a user-entered count, denomination, and unit mass. Data Usage Budget Calculator Project total mobile or broadband data use from average daily usage, active days, an overhead allowance, and a plan limit in the selected data unit. Energy Use Intensity (EUI) Calculator Calculate a building’s annual energy use intensity from total annual energy, floor area, and globally usable energy and area units. Diamond Dimension Weight Estimator Estimate diamond carat weight from shape, dimensions, and an optional proportion adjustment, with clear distinction between planning weight and a laboratory measurement. Traffic Density and Flow Calculator Estimate vehicles per kilometre, per-lane density, flow per lane, and average spacing from a road segment observation. Tables Needed for Guests Calculator Calculate how many identical tables are needed for a guest count, plus seats provided, unused seats, and occupancy. NATO Phonetic Alphabet Encoder and Decoder Encode letters into the international NATO spelling alphabet or decode official code words back into text. Rat Cage Size and Space Check Calculator Compare a rat enclosure’s usable floor area and clear height with an entered welfare baseline for a specified number of rats. Amount in Words Calculator Turn a numeric amount into readable English currency words for supported international currencies, including major and minor units, with a clear warning for formal documents. Density-Based Freight Class Planning Calculator Estimate shipment density and the density-based NMFC planning class from package dimensions and total weight, with the classification boundary kept visible. Generator Wattage Planning Calculator Estimate a generator’s planning wattage and apparent-power requirement from continuous load, starting surge, overlap, reserve, and power factor. Hot-Tub Operating Cost Calculator Estimate hot-tub heating, pump, refill, recurring electricity, and first-fill costs from your equipment and local prices. Fabric Yardage and Cutting-Length Calculator Estimate fabric length for repeated rectangular pieces from piece dimensions, count, fabric width, and an explicit waste allowance. Blind and Shade Size Planner Plan an inside- or outside-mount blind size from opening measurements, depth, overlap, and mounting extensions without applying hidden manufacturer deductions. Pomodoro Focus Schedule Planner Plan focus sessions, short breaks, long-break placement, preparation, and wrap-up time with an explicit schedule rather than a fixed timer guess. D&D Money Conversion Calculator Convert copper, silver, electrum, gold, and platinum pieces into a common copper value and a normalized purse display. 5e Encounter Difficulty Calculator Estimate a fifth-edition 2014 encounter's adjusted XP and compare it with the party's easy, medium, hard, and deadly thresholds. Flag Size and Proportion Planner Plan a rectangular flag's fly length, face area, pole position, and remaining pole using a chosen hoist-to-fly ratio. Flooring Tiles Estimator Tiles needed for a floor area from tile size, plus a buy quantity with waste allowance. Sleep Cycle Wake-Up Time Wake-up time from a bedtime plus a whole number of 90-minute sleep cycles. Wallpaper Rolls Strips and rolls needed from wall size and roll size. Fence Boards Pickets needed for a run from board width and gap. Laundry Loads per Bottle Exact and whole wash loads from bottle size and dose. Pet Food Days Days and weeks one bag lasts at a fixed daily ration. Weekly Screen Time Weekly minutes and hours from average daily screen time. Formula Scoops Scoops of powdered formula from fluid ounces and scoops per ounce. Board Foot Calculate lumber volume in board feet from thickness, width, and length in customary dimensions. Drywall Panel Estimate Estimate the number of drywall panels from wall area, openings, panel size, and an entered waste allowance. Hollow Pipe Volume Calculate the internal volume of a straight hollow circular pipe from its diameters and length. Roof Pitch Calculate roof pitch percentage, slope angle, and rafter length from rise and horizontal run. Idling Fuel Consumption Estimate fuel used and fuel cost from an entered idle consumption rate and duration. Lighting Level Estimate average illuminance from lumens per fixture, fixture count, and illuminated area. Square Footage Calculator Calculate area for rectangles, circles, triangles, and trapezoids, with optional material cost. BTU Room Sizing Estimate Estimate room heating or cooling capacity with a visible area, ceiling, insulation, climate, and occupancy heuristic. Golf Handicap Differential Estimate Estimate a simplified 20-score handicap index from scores, course rating, slope, and PCC. Roofing Materials Estimate Estimate sloped roof area, roofing squares, and nominal bundles from a rectangular plan, pitch, and waste. Gravel and Aggregate Estimate Estimate gravel volume and mass from footprint, depth, waste, and bulk density. Bra Size Estimate Estimate a regional bra band and cup size from underbust and bust measurements. Electricity Use and Cost Calculator Estimate energy use and electricity cost from appliance power, hours, days, and an entered rate. Gas Mileage Calculator Calculate distance, fuel economy, fuel cost, and cost per distance from odometer and refueling readings. Stair Geometry Calculator Estimate riser count, actual riser height, tread count, total run, and stair angle from basic dimensions. Tire Size Comparison Calculate tire section height and overall diameter, then compare diameter and indicated-speed effects.

Length Converter Convert metric and international customary lengths, including statute and nautical miles, using defined factors. Weight and Mass Converter Convert kilograms, grams, milligrams, metric tonnes, pounds, ounces, and stones as units of mass. Temperature Converter Convert absolute temperatures among Celsius, Fahrenheit, and Kelvin, with absolute-zero validation. Area Converter Convert square metric and customary units, hectares, and international acres without confusing linear and area factors. Volume Converter Convert liters, milliliters, cubic units, US liquid gallons, and Imperial gallons with explicit gallon definitions. Speed Converter Convert meters per second, kilometers per hour, miles per hour, feet per second, and knots. Angle Converter (Degrees and Radians) Convert angles between degrees and radians. Dimensional Weight and Chargeable Weight Calculator Estimate volumetric shipping weight and choose the larger of actual and dimensional weight using a user-supplied divisor. Acres to Ares Conversion Calculator Convert an area in acres to ares and square metres using an exact metric relationship. Angle Degrees Radians and Turns Converter Convert a degree angle into radians and full turns. Angstroms to Nanometres Converter Convert a length in angstroms to nanometres and metres. Atmospheres to Pascals Converter Convert standard atmospheres to pascals and kilopascals. Bar to PSI Converter Convert pressure in bar to pounds per square inch and kilopascals. Binary to Hexadecimal Converter Convert a nonnegative binary integer into hexadecimal and decimal representations. Bytes Bits and Decimal Storage Converter Convert a byte count into bits, decimal kilobytes, and decimal megabytes. Celsius to Fahrenheit Converter Convert a Celsius temperature to Fahrenheit and Kelvin. Centimetres to Feet and Inches Converter Convert centimetres to total inches and a feet-plus-inches display. Decimal Integer to Hexadecimal Converter Convert a signed whole-number value into hexadecimal notation. Degrees to Radians Converter Convert an angle in degrees to radians and turns. dBm to Watts Converter Convert a power level in dBm to watts and milliwatts. Fuel Economy L/100 km to km/L and MPG Converter Convert metric fuel economy in litres per 100 kilometres to kilometres per litre and US miles per gallon. Knots to Kilometres per Hour Converter Convert speed in nautical knots to kilometres per hour and miles per hour. Kilometres to Miles Converter Convert a distance in kilometres to statute miles and metres. Decimal Inches to Fractional Inches Converter Convert decimal inches to the nearest fraction using a selected denominator. Kelvin to Celsius Converter Convert an absolute temperature in kelvin to Celsius and Fahrenheit. Kilograms to Pounds Converter Convert mass in kilograms to international pounds and grams. Kilopascals to PSI Converter Convert pressure in kilopascals to pounds per square inch and bar. Litres to Cubic Centimetres Converter Convert liquid volume in litres to cubic centimetres and millilitres. Acres to Hectares Converter Convert international acres into hectares and square metres for land-area planning. Ares to Hectares Converter Convert ares into hectares and square metres using the metric land-area relationship. CCF to Gallons Converter Convert hundred cubic feet of gas or water volume into cubic feet, US gallons, and litres. CCF to Therms Calculator Estimate natural-gas energy in therms and kilowatt-hours from CCF using an explicit heat-content input. Crore to Lakh Converter Convert a value expressed in crores into lakhs and the underlying count of units. Crore to Million Converter Convert crores into millions and billions while keeping the underlying count visible. Million to Lakh Converter Convert millions into lakhs and crores for comparing international and South Asian number formats. Gaj to Square-Yard Converter Convert a regional gaj area into square yards, square feet, and square metres using a visible local factor. Katha to Square-Feet Converter Convert katha into square feet, square metres, and acres with a user-supplied regional katha factor. Mesh to Micron Opening Converter Estimate sieve pitch and opening size from mesh count and an explicit wire diameter. PPM to Milligrams per Litre Converter Convert a dilute mass concentration in ppm into mg/L and g/L using solution density. Price per Litre to Price per Gallon Converter Convert a unit price per litre into a price per US or imperial gallon without changing the currency. Paper Quantity and Ream Calculator Estimate sheets and reams from page count, copies, print sides, and a visible waste allowance. Pixels to Inches Converter Convert a pixel dimension into inches and centimetres from an explicit pixels-per-inch resolution. Pixels to em and rem Converter Convert a pixel value into em and rem units from the relevant parent and root font sizes. Drawing Scale Converter Convert a drawing length to a real length or reverse it using a clear 1-to-N scale denominator. Natural Gas Volume and Energy Converter Convert CCF, therms, cubic metres, and kilowatt-hours using explicit regional heat-content assumptions. Gallons to Mass and Tons Calculator Convert a liquid volume into kilograms and US short or metric tonnes from density and gallon definition. Cubic Yards to Tons Calculator Estimate material mass from cubic yards, bulk density, and a visible waste allowance in US short and metric tonnes. Grams to Fluid Ounces Converter Convert mass into millilitres and US or imperial fluid ounces using an explicit material density. Astronomical Unit Converter Convert astronomical units to metres, kilometres, and miles using the exact SI-defined astronomical unit. Barometric Pressure Unit Converter Convert a pressure reading in hectopascals into pascals, kilopascals, millimetres of mercury, inches of mercury, and psi. Billion to Trillion Converter Convert a decimal count expressed in billions into trillions, millions, and the underlying absolute count. Binary to Octal Converter Convert a nonnegative binary integer into decimal, octal, and hexadecimal representations. Cubic Centimetres to Millilitres Converter Convert cubic centimetres into millilitres, litres, and cubic metres using the exact volume equivalence. Celsius Temperature Converter Convert a Celsius temperature into Fahrenheit, kelvin, and Rankine while keeping absolute-zero validation visible. Centimetres to Kilometres Converter Convert a length in centimetres into metres, kilometres, millimetres, and inches. US Cups to Pints Converter Convert US customary cups into US pints, fluid ounces, quarts, and gallons with the serving-volume convention stated. Day to Time-Unit Converter Convert days into hours, minutes, seconds, and weeks using a fixed 24-hour day. Decagram to Gram Converter Convert decagrams into grams, kilograms, milligrams, and pounds using SI mass prefixes and the international pound. Decimal Degrees to DMS Converter Convert signed decimal degrees into degree, arcminute, arcsecond, and total-arcsecond components. Hectares to Acres Converter Convert hectares into square metres, square kilometres, international acres, and square feet. Knots to Miles per Hour Converter Convert nautical speed in knots into international miles per hour, kilometres per hour, and metres per second. Kilograms to Stones Converter Convert kilograms into UK stones, pounds, grams, and tonnes using the international avoirdupois pound. Kilobytes to Megabytes Converter Convert decimal kilobytes into bytes, megabytes, gigabytes, and binary mebibytes with the convention shown. Kilopascals to Atmospheres Converter Convert kilopascals into standard atmospheres, pascals, psi, torr, and millimetres of mercury. Litres to Centilitres Converter Convert litres into centilitres, millilitres, cubic centimetres, and cubic metres. Micrograms to Milligrams Converter Convert micrograms into milligrams, grams, nanograms, and kilograms while keeping SI prefixes explicit. Minutes to Decimal Time Converter Convert a duration in minutes into decimal hours, decimal days, seconds, and a readable hours-and-minutes value. Light-Year Distance Converter Convert light-years into kilometres, metres, astronomical units, and international miles using light speed and a Julian year. Acreage from Length and Width Calculate land area from rectangular dimensions and display the result in square feet, acres, and hectares. Binary and Decimal Base Converter Convert a nonnegative whole number between binary notation and decimal notation while keeping every bit visible. Hex Color to RGB and HSL Converter Decode a three-, six-, or eight-digit hexadecimal color into RGB, HSL, alpha, and relative luminance values. Cycles per Second and RPM Converter Convert a repeating rate between cycles per second, hertz, and revolutions per minute, then show the period. Cubic Centimeters to Grams Converter Convert a measured volume in cubic centimeters to mass when the material density is known. Cubic Feet to Pounds by Density Estimate material mass in pounds from cubic feet, density, and an optional waste or handling allowance. Land Cent to Square Meter Converter Convert the land-area unit cent to square meters, square feet, and acres using the one-cent-per-hundredth-acre convention. CGS and SI Unit Converter Convert compatible length, mass, force, and energy quantities between common CGS and SI units. Atmospheres Pressure Converter Convert standard atmospheres into pascals, kilopascals, bar, psi, and millimeters of mercury. Bar Gauge to PSIG Converter Convert a gauge pressure in bar to psig, absolute psi, and gauge kilopascals using an explicit atmospheric-pressure setting. Centimeters to Inches Converter Convert centimetres into international inches and companion metric and imperial length units. Acres to Square Feet Converter Convert international acres into square feet, square metres, hectares, and square yards with the unit basis stated. SCFM to SI Flow Converter Convert standard cubic feet per minute into cubic metres per second, cubic metres per hour, and litres per second. Pounds per Minute Flow Converter Convert mass flow in pounds per minute into kilograms per second, kilograms per hour, grams per second, and pounds per hour. Carat Weight Conversion Calculator Convert a gemstone mass between metric carats, points, grams, milligrams, and avoirdupois ounces without confusing carat weight with gold purity. Mbps to Gbps and GB/s Converter Convert megabits per second into gigabits per second, megabytes per second, gigabytes per second, and bits per second using decimal network units. KSI to MPa Pressure Converter Convert pressure in kilopounds per square inch into megapascals, psi, pascals, and gigapascals with explicit unit relationships. mmol/L to mg/dL Calculator Convert a selected laboratory analyte from mmol/L to mg/dL using its molecular weight, with a reverse-conversion check shown beside the answer. Drops to Milliliters Converter Convert a counted number of drops to milliliters, liters, and microliters using the measured drop volume for the actual dispenser. Decimal to Octal Converter Convert a safe-range decimal integer to prefixed octal and binary notation while preserving negative values and showing the digit count. Cents to Dollars Converter Convert a nonnegative number of US cents into dollars, whole dollars, and remaining cents without applying exchange rates. Days to Months Duration Converter Convert elapsed days to months and years using an average Gregorian, 30-day billing, or 365-day-year convention. Hours to Years Duration Converter Convert elapsed hours to years, 24-hour days, and minutes using an explicit hours-per-year convention. Euro Cents to Euros Converter Convert euro cents into euros, whole euros, and the remaining cent component without applying a foreign-exchange rate. Cubic Centimetres to US Fluid Ounces Converter Convert cubic centimetres into US fluid ounces, millilitres, US cups, and litres while keeping volume ounces separate from mass ounces. Numbers to Words Converter Convert whole numbers from zero through 999,999,999 into canonical English words, or parse those words back into a decimal integer. Pressure Unit Converter Convert pressure among pascals, kilopascals, megapascals, bar, standard atmospheres, pounds per square inch, and millimeters of mercury. Energy Unit Converter Convert joules, kilojoules, megajoules, watt-hours, kilowatt-hours, calories, kilocalories, and British thermal units. Power Unit Converter Convert watts, kilowatts, megawatts, mechanical horsepower, and British thermal units per hour. Force Unit Converter Convert newtons, kilonewtons, pounds-force, and kilogram-force through a shared SI base. Frequency Unit Converter Convert hertz, kilohertz, megahertz, gigahertz, and revolutions per minute using cycles per second as the base. Torque Unit Converter Convert newton-meters, kilonewton-meters, pound-feet, pound-inches, kilogram-force meters, and kilogram-force centimeters. Capacitance Unit Converter Convert capacitance values among farads and common SI-prefixed units. Decimal Degrees and DMS Converter Convert a signed decimal-degree coordinate to degrees-minutes-seconds or convert DMS back to decimal degrees. Density Unit Converter Convert density values among common SI and mass-volume units. Custom-Rate Currency Converter Convert an amount with a rate you supply instead of silently using stale or unverified live exchange data. Shoe Size Conversion Convert an approximate shoe size among US men's, US women's, UK, EU, and Japanese length systems.

Age in Completed Years and Days Calculate completed calendar years and exact elapsed days between a birth date and a chosen date. Date Difference Calculator Count elapsed or inclusive calendar days between dates, with whole weeks and leftover days. Add or Subtract Calendar Days Move forward or backward by a whole number of days while correctly crossing months, years, and leap days. Time Duration Calculator Find hours and minutes between two clock times on the same day or the following day. Work Hours and Unpaid Break Calculator Calculate net paid hours for a shift and a chosen number of identical shifts after unpaid breaks. Pregnancy Due Date (Naegele's Rule) Estimate a due date as 280 days after the first day of the last menstrual period. Business Days Calculator Count weekdays between two dates with explicit endpoint rules and your own holiday list. Day of Week Calculator Find the weekday and ISO weekday number for any valid Gregorian date from year 1 through 9999. Age Between Dates Calculator Calculate completed years and total elapsed days between a birth date and a chosen date. Counted Hours and Minutes Calculator Convert a number of shifts and hours per shift into total hours and minutes, with an optional unpaid break. Add Time Durations Calculator Add two durations and normalize the total into days, hours, minutes, and seconds without wrapping at midnight. Birth Date from Death Date and Exact Age Calculator Work backward from a death date and an entered completed age in years, months, and days using explicit Gregorian calendar arithmetic for genealogy and historical records. Palindrome Date Checker Check whether a date reads the same forward and backward in a selected numeric format and search for the next matching date. Ovulation and Fertile Window Estimate Estimate a next period, ovulation date, and fertile window from cycle assumptions. Time Zone Offset Converter Convert a date and time between two fixed UTC offsets without pretending to know city daylight-saving rules.