Sports and performance statistics

Running Pace and Speed Calculator Calculate average running pace and speed from distance and elapsed time. Bowling Average Calculator Calculate a simple bowling average from total runs and completed innings or games. Cycling Cadence Calculator Estimate wheel speed and crank cadence from road speed, wheel diameter, and a wheel-to-crank ratio. Batting Strike Rate Calculator Calculate a cricket batting strike rate from runs scored and legal balls faced. Bicycle Gear Ratio Calculator Calculate bicycle gear ratio and mechanical distance per crank revolution from front and rear sprocket teeth. Elo Rating Update Calculator Calculate expected score and a new Elo rating from two ratings, a K-factor, and an entered match result. Cycling Power Estimate Estimate steady cycling power from mass, speed, road grade, rolling resistance, and aerodynamic drag inputs. Ape Index Calculator Calculate the difference and ratio between arm span and height as a simple body-proportion measure. Vertical Jump Requirement Calculator Calculate the vertical jump required to clear a target height from standing reach and a desired clearance margin. Bicycle Frame Size Estimate Estimate a bicycle frame size from inseam length and a selected road or mountain-bike multiplier. E-Bike Range Estimate Estimate electric-bike travel range from battery energy, usable efficiency, reserve, and energy consumption per distance. Fishing Reel Line Capacity Calculator Estimate line length on a cylindrical spool from outer diameter, core diameter, spool width, and line diameter. Bicycle Speed from Cadence Calculator Calculate bicycle speed from wheel diameter, cadence, and a wheel-to-crank distance ratio. Hiking Time with Elevation Calculator Estimate hiking time from horizontal distance, base speed, elevation gain, and a supplied climbing speed. Displacement Hull Speed Calculator Estimate a traditional displacement-hull speed from waterline length using a supplied hull-speed coefficient. Walking Stride Length Calculator Calculate average stride length from walking distance and step count, with a metres-per-step result. Steps to Distance Calculator Estimate walking distance from step count and an explicitly supplied average stride length. Pool Table Room Size Calculator Calculate minimum room length, width, and area from table dimensions and cue clearance on every side. 0–60 Acceleration Calculator Estimate average acceleration and travel distance for a 0-to-speed run from elapsed time under a constant-acceleration model. Bench Press One-Rep-Max Estimate Estimate a bench-press one-repetition maximum from a lifted load and completed repetitions using the Epley relation. Bicycle Chain Length Estimate Estimate bicycle chain length in chain pitches from center distance and front and rear sprocket tooth counts. Fish Weight Estimate from Length and Girth Estimate fish mass from entered length, girth, and a visible species or unit coefficient. Generic Game Score Calculator Add scored events with entered point values to calculate a transparent team or game score. Pace and Speed Calculator Calculate average pace and speed from a distance, elapsed time, and the distance unit you use. 5K Pace Calculator Convert a 5-kilometre finish time into average kilometre and mile pace and speed. Half-Marathon Pace Calculator Calculate average pace and speed for a half-marathon from a finish time. Marathon Pace Calculator Calculate average marathon pace and speed from a full-marathon finish time. Cycling Pace and Moving Speed Calculator Separate moving time from stop time to estimate cycling pace, moving speed, and elapsed speed. Bike Cadence and Speed Calculator Estimate bicycle speed from wheel diameter, pedalling cadence, and wheel-to-crank gear ratio. Race Time Predictor Project a target race time from a completed distance and time using an adjustable endurance exponent. Training Pace Calculator Estimate a target training pace from a reference performance, target distance, and selected effort percentage. Walking Calorie Estimate Estimate walking energy from body mass, duration, speed, and uphill or downhill grade using a transparent exercise equation. Running Calorie Estimate Estimate running energy from body mass, distance, and a user-selected terrain factor. Jump-Rope Calorie Estimate Estimate jump-rope energy from body mass, duration, and a selected rope-skipping intensity. Stair-Climbing Energy Calculator Estimate the energy needed to raise a body through a number of stair flights using gravitational work and an efficiency assumption. Steps to Calories Estimate Convert steps into an estimated walking distance and energy using stride length and an explicit energy-per-distance assumption. Steps to Miles and Kilometres Calculator Estimate walking distance from a step count and average stride length in both kilometres and miles. Hiking Time Estimate Estimate hiking time from horizontal distance, elevation gain, terrain factor, and planned rest time. Triathlon Time Calculator Add swim, bike, run, and transition estimates to plan a total triathlon time. Swimming Time Calculator Estimate total swim-session time from distance, pace per 100 metres, and planned rest intervals. Cycling Power Zones Calculator Build cycling power zones from functional threshold power using a selectable five-zone or seven-zone percentage scheme. Target Heart-Rate Range Calculator Estimate a heart-rate range with the heart-rate-reserve method from age, resting pulse, and two intensity percentages. Heart-Rate Recovery Calculator Calculate the one-minute heart-rate drop and normalized recovery from resting, peak, and post-exercise heart rates. Poker Drawing Odds from Outs Calculate the chance of hitting at least one out by the next one or two cards from unseen-card count. Poker Expected Value of a Call Estimate the expected profit or loss of a poker call from win, tie, pot, and call-cost assumptions. Fielding Independent Pitching Calculate a baseball pitcher's FIP-style estimate from home runs, walks, hit batters, strikeouts, innings, and a chosen league constant. NFL-Style Passer Rating Calculator Calculate the NFL-style passer rating from attempts, completions, passing yards, touchdowns, and interceptions. Cricket Net Run Rate Calculator Calculate a cricket team's net run rate from runs scored, runs conceded, and the legal balls in each innings sample. MET-Minutes per Week Calculator Estimate weekly MET-minutes from activity intensity, session duration, and sessions per week, with time-equivalent views. Cooper 1.5-Mile VO₂ Max Estimate Estimate VO₂ max from a timed 1.5-mile run or walk using the Cooper Institute field-test equation. Race Split Planner Build an even split schedule from a target distance, finish time, and split length, including the final partial split when the distances do not divide evenly. Rowing Erg Pace and Watts Calculator Calculate rowing-erg work time, 500-metre split pace, average speed, estimated watts, and total session time for repeated intervals with optional rest. Cycling Breakaway Gap Planner Estimate how a speed difference changes a cycling breakaway's physical gap over a selected time horizon and when a target gap could be reached. Bench Press Pyramid Volume Planner Build a transparent ascending or descending bench-press percentage pyramid from a user-entered one-rep maximum, set count, repetitions, and percentage step. Ski Length Range Scenario Calculator Create a transparent ski-length range from height, ability, terrain, and editable shorter- and longer-end adjustments instead of presenting one universal ski size. Tennis Ball Inventory Planner Estimate match balls, practice balls, replacement allowance, and cans needed for a tennis event or training block using editable event rules. Cricket Follow-On Lead Calculator Check a first-innings lead against the selected match duration and show the shortfall or margin for a follow-on option. Bruce Protocol METs Estimate Estimate treadmill workload, oxygen uptake, and METs for a selected stage of the standard Bruce exercise-testing protocol. Women’s Heptathlon Points Calculator Estimate points for the seven events in a women’s heptathlon and show track, field, event, and total scores. Wilks Powerlifting Score Calculator Calculate the historical Wilks coefficient and bodyweight-adjusted powerlifting score from category, body weight, and total. 5/3/1 Training-Max Percentage Calculator Plan three working sets from a 5/3/1 training max, selected week, and equipment rounding increment. Baseball Magic Number Calculator Calculate the standings combination of wins and opponent losses needed to clinch a baseball goal from the loss-column gap and games remaining. Human Punch Force Estimate Estimate average model force, impulse, velocity change, and kinetic energy from effective striking mass, acceleration, and contact time. Age-Graded Running Calculator Compare a runner's entered race time with an age-and-category reference standard, then show age grade, time gap, pace, and speed without pretending to supply an official table. Anaerobic Threshold Field-Test Calculator Estimate a threshold heart rate and pace from a controlled time trial, show heart-rate drift, and display transparent planning screens with clear limits. Triathlon Finish-Time Breakdown Calculator Add swim, bike, run, and transition times for a sprint, standard, or custom course and show total time, discipline shares, pace, and speed. Magic Mile Race-Time Predictor Project a target running time from a measured mile using a transparent distance-power model, with target pace, speed, and model cost shown together. Triathlon Training-Load Planner Project weekly training hours through a build and taper using explicit progression, reduction, and session-count inputs, with a transparent workload summary. Cricket Rain-Interrupted Target Calculator Apply supplied first- and second-innings resource percentages to estimate a revised cricket target, while keeping the resource-ratio method separate from official professional tables. ICC T20 Team Ranking Points Calculator Project one team's match points and updated rating from two supplied team ratings, a result, and the number of matches already represented in the average. Windsurfing Apparent-Wind and Sail-Force Calculator Resolve true wind and board motion into apparent wind, dynamic pressure, and a transparent sail-force screen for a simplified windsurfing physics scenario. Heart-Rate Energy Estimate Calculator Estimate exercise energy from average heart rate, body mass, age, equation branch, and duration using a transparent population-derived heart-rate model. Snow-Shoveling Energy Calculator Estimate total and active-above-rest energy for manual snow shoveling from body mass, duration, and moderate or vigorous activity intensity. Race Time Improvement Calculator Apply a chosen percentage improvement to a current race time and show the faster target, seconds saved, and equivalent minutes saved. Goalkeeper Save Percentage Calculator Calculate save percentage, shots not saved, concession percentage, and shots faced per save from a defined shot sample. Fat-Burning Heart-Rate Zone Calculator Compare percentage, Karvonen heart-rate-reserve, and Zoladz reference ranges from age, resting heart rate, and a maximum-heart-rate choice. Scuba Neutral-Buoyancy Ballast Estimate Estimate the ballast mass needed for a simplified neutral-buoyancy scenario from diver, equipment, suit, cylinder, gas, and water-density inputs. Kiteboarding Apparent Wind and Force Screen Estimate apparent wind, aerodynamic dynamic pressure, lift, drag, and resultant kite force from wind, rider speed, angle, kite area, and coefficients. Batting Average Calculate a baseball hitter's batting average from hits and at-bats. On-Base Percentage Calculate baseball on-base percentage from hits, walks, hit-by-pitches, at-bats, and sacrifice flies. Slugging Percentage Calculate baseball slugging percentage from hit-type counts and at-bats. On-Base Plus Slugging Add already-calculated on-base and slugging percentages to obtain OPS. Earned Run Average Calculate a baseball pitcher's earned-run average from earned runs and recorded outs. Baseball WHIP Calculate walks plus hits per inning pitched from a baseball pitching line. Fielding Percentage Calculate a baseball fielder's fielding percentage from putouts, assists, and errors. Effective Field Goal Percentage Calculate basketball effective field goal percentage while giving made three-pointers extra shot value. True Shooting Percentage Estimate basketball true shooting percentage from points, field-goal attempts, and free-throw attempts. Faceoff Win Percentage Calculate a hockey player's faceoff win percentage from wins and losses. Goalie Save Percentage Calculate a hockey goaltender's save percentage from saves and goals allowed. Goals-Against Average Calculate a hockey goaltender's goals-against average from goals allowed and minutes played. Winning Percentage Calculate a team's or player's win rate from wins and losses.

Adult BMI Screening Calculate body mass index from weight and height and view CDC screening categories for adults age 20 and older, without treating BMI as a diagnosis or a body-fat measurement. Adult Maintenance Energy Estimate Estimate daily maintenance energy expenditure using the sex-specific Mifflin-St Jeor resting-energy equation and a clearly labeled heuristic activity multiplier, without prescribing calorie intake. Adult BMI Reference Weight Interval Translate the CDC adult BMI reference interval into weights for your height, clearly distinguishing a screening reference from an individual ideal weight or treatment goal. Weight Change Arithmetic Timeline Compare two adult body weights and calculate the arithmetic duration at a user-assumed weekly change, without claiming that the pace, target, or timeline is safe or physiologically predictable. Fat-Free and Fat Mass Estimate Split adult body weight into estimated fat mass and fat-free mass using a supplied body-fat percentage, without mislabeling all fat-free tissue as muscle. Adult Resting Energy and BMR Proxy Estimate resting energy expenditure with the male or female Mifflin-St Jeor coefficient, while distinguishing this common BMR proxy from a measured basal metabolic rate. Adult Age-Predicted Heart Rate Estimate maximum heart rate with the Tanaka research equation and calculate a selected percentage of that estimate, without presenting a safe ceiling or exercise prescription. Tablet Dosage Count Number of tablets for an ordered dose from tablet strength. Weight-Based Dose Total dose from body weight and per-kilogram ordering. IV Drip Rate Gravity drip rate in drops per minute plus pump rate in mL per hour. Liquid Dosage Volume Millilitres to pour for an ordered dose from bottle strength. Gestational Age Tracker Weeks and days since the last period at any reference date. Body Surface Area Calculator Estimate body surface area with the Mosteller height-and-weight formula for a transparent size comparison. Waist-to-Height Ratio Calculator Calculate waist-to-height ratio using measurements entered in the same unit. Alcohol Amount and Standard-Unit Calculator Calculate pure alcohol mass and an explicit standard-unit count from beverage volume, alcohol percentage, density, and a user-defined unit size. Maximum Heart Rate Estimate Estimate a theoretical maximum heart rate using a selected age-based equation for fitness planning only. Heart Rate Training Zone Calculator Calculate a heart-rate reserve training zone from resting heart rate, age-based maximum estimate, and lower and upper intensity percentages. Visual Acuity Ratio Scenario Calculator Convert a supplied Snellen-style numerator and denominator into a decimal acuity ratio and logMAR value. Six-Minute Walk Distance and Pace Calculator Calculate pace and speed from a walking distance and timed test interval. Ninety-Minute Sleep Cycle Time Calculator Estimate total time represented by a selected number of sleep cycles using a supplied cycle length. A Body Shape Index Arithmetic Calculator Calculate the A Body Shape Index from supplied waist, height, and BMI values. Adjusted Weight Arithmetic Calculator Calculate an adjusted-weight scenario from actual weight, reference weight, and a supplied correction factor. Body Frame Ratio Calculator Calculate a height-to-wrist circumference ratio from supplied measurements. Estimated Total Body Water Calculator Estimate total body water with a selected adult Watson-equation coefficient set. Caffeine Remaining Amount Calculator Estimate remaining caffeine from an initial amount, half-life, and elapsed time using exponential decay arithmetic. Circadian Phase Shift Arithmetic Calculator Normalize a clock phase after a supplied time shift across a 24-hour cycle. Cholesterol Unit Conversion Calculator Convert a supplied cholesterol value between mg/dL and mmol/L using the conventional factor. Conception and Due-Date Date Arithmetic Calculator Estimate date offsets from a supplied last menstrual period date using adjustable planning intervals. Dog-Walking Energy Estimate Calculator Estimate activity energy from body mass, walking duration, and a supplied MET value. Eight-Item Sleepiness Score Sum Calculator Sum eight supplied 0-to-3 item responses and calculate the mean response. Dietary Fiber Target Arithmetic Calculator Calculate a proportional fiber target from daily calories and a supplied grams-per-1,000-calories factor. Fat-Free Mass Index Calculator Calculate fat-free mass index from fat-free mass and height, with an optional height-normalized value. Glycemic Load Scenario Calculator Calculate glycemic load from carbohydrate grams, glycemic index, and number of servings. Hand Sanitizer Volume Calculator Calculate total sanitizer volume and active-liquid volume from uses, amount per use, and active fraction. Net Carbohydrate Arithmetic Calculator Calculate net carbohydrates by subtracting supplied fiber and sugar-alcohol amounts from total carbohydrates. Smoking Pack-Years Arithmetic Calculator Calculate pack-years from cigarettes per day and years of smoking history. Sleep Debt Arithmetic Calculator Calculate accumulated difference between a supplied nightly sleep need and actual sleep over multiple nights. Oxygen Cylinder Duration Estimate Estimate available ambient-equivalent gas and duration from cylinder water capacity, gauge pressures, ambient pressure, and a stated flow rate. Ankle-Brachial Index Calculator Calculate an ankle-brachial index from ankle systolic pressure and the higher of two entered brachial pressures. Alveolar–Arterial Oxygen Gradient Calculator Estimate alveolar oxygen pressure with the simplified alveolar gas equation and subtract arterial oxygen pressure to calculate the A–a gradient. Anion Gap Calculator Calculate the potassium-excluded anion gap from serum sodium, chloride, and bicarbonate values. Albumin/Globulin Ratio Calculator Derive globulin from total protein and albumin, then calculate the albumin-to-globulin ratio and each component’s share. APRI Liver Fibrosis Index Calculator Calculate the AST-to-platelet ratio index from AST, the laboratory’s AST upper limit of normal, and platelet count. AST/ALT Ratio Calculator Calculate the arithmetic ratio of aspartate aminotransferase to alanine aminotransferase and show the supporting difference and shares. 4Ts Score Worksheet for HIT Pretest Probability Add the four 4Ts clinical components into a transparent 0–8 point worksheet for heparin-induced thrombocytopenia assessment. Aldrete Post-Anesthesia Recovery Score Worksheet Add five post-anesthesia recovery domains into a transparent 0–10 Aldrete score worksheet with the component points kept visible. Apnea–Hypopnea Index (AHI) Calculator Calculate an apnea–hypopnea index from scored apnea events, hypopnea events, and the stated sleep or recording duration. Aortic Valve Area by Continuity Equation Estimate effective aortic valve area from LVOT diameter, LVOT velocity-time integral, and aortic valve velocity-time integral. Cat Quality-of-Life HHHHHMM Worksheet Record seven subjective pet-wellbeing domains on a 1–10 scale and review the total, average, lowest domain, and good-day balance. Cerebral Perfusion Pressure Calculator Estimate mean arterial pressure and cerebral perfusion pressure from systolic pressure, diastolic pressure, and intracranial pressure while keeping the clinical limits visible. ECG Boxes to Seconds Calculator Convert counted small and large ECG paper boxes into seconds and milliseconds for a selected 25 or 50 mm/s paper speed. Fagerström Test for Nicotine Dependence Calculator Score the six-item Fagerström nicotine-dependence screening questionnaire with a visible item total and a clear boundary between screening and clinical care. Fatigue Severity Scale Calculator Calculate the nine-response Fatigue Severity Scale total and mean from responses entered on the official or authorized form, with a clear boundary between arithmetic and clinical interpretation. Absolute Neutrophil Count Without Bands Calculator Calculate an absolute neutrophil count from the white blood cell count and mature neutrophil percentage when bands are intentionally excluded from the entered differential. Alvarado Appendicitis Screening Score Calculator Add the eight scored Alvarado/MANTRELS findings and show the transparent ten-point total without turning a screening score into a diagnosis. Adjusted Age for a Premature Baby Calculator Estimate corrected age from chronological age and gestational age at birth using a 40-week reference, with a separate display for weeks born early. Urine Albumin-to-Creatinine Ratio Calculator Normalize urine albumin and creatinine units and calculate the spot urine albumin-to-creatinine ratio in mg albumin per gram creatinine. Full Bishop Score Calculator Add the five components of the traditional Bishop score—dilation, effacement, station, consistency, and position—for a documented cervical examination. Apgar Score Calculator Add the five documented Apgar components—appearance, pulse, grimace, activity, and respiration—with transparent 0–2 point arithmetic and clinical boundaries. Braden Scale Score Calculator Add the six Braden pressure-injury risk subscales, show each contribution, and keep the commonly cited 18-point context separate from local clinical policy. Body Surface Area (BSA) Estimator Estimate body surface area from height and weight using selectable Mosteller, DuBois, or Haycock equations and compare the outputs without hiding formula differences. Estimated Adult Blood Volume Calculator Estimate adult total blood volume from sex-specific Nadler equations using height and weight, with liters, milliliters, and mL/kg shown separately. Beighton Hypermobility Score Calculator Add the five Beighton examination maneuvers as a transparent nine-point score, showing paired joint contributions and keeping age-specific interpretation separate. Barthel Index Calculator Add ten activities of daily living in a common 0–100 Barthel Index format and show the functional contributions without treating dependency bands as universal rules. BASDAI Symptom Score Calculator Calculate the six-question BASDAI symptom score from 0–10 responses, showing the first-four sum and the morning-stiffness average separately. APACHE II Severity Score Calculator Calculate the APACHE II arithmetic from 12 acute-physiology components, age points, and chronic-health points, with oxygenation mode and creatinine weighting made explicit. Brief Interview for Mental Status (BIMS) Score Calculator Add the component points of the 15-point Brief Interview for Mental Status structure while keeping the screening result separate from diagnosis. Child–Pugh Liver Function Score Calculator Add the five Child–Turcotte–Pugh components—bilirubin, albumin, INR, ascites, and encephalopathy—with the class boundaries and subjective fields clearly separated. Ejection Fraction Calculator Calculate stroke volume and left-ventricular ejection fraction from end-diastolic and end-systolic volumes, with the result kept separate from an echocardiography diagnosis. Absolute Eosinophil Count Calculator Estimate absolute eosinophil count from the total white-cell count and eosinophil percentage, showing both laboratory units and a cautious reference context. Cardiac Index Calculator Estimate cardiac index from cardiac output and body surface area, or derive cardiac output from heart rate and stroke volume before indexing it. Bladder Volume Calculator Estimate bladder volume from three ultrasound dimensions using a selectable ellipsoid correction factor, with transparent units and limitations. Duke Activity Status Index (DASI) Calculator Add the twelve scored DASI activity components and estimate the associated MET value without reproducing the instrument’s question wording. EPDS Scored Total Calculator Add ten already-scored Edinburgh Postnatal Depression Scale item values while keeping safety follow-up separate from a screening total. Cockcroft–Gault Creatinine Clearance Calculator Estimate adult creatinine clearance with the Cockcroft–Gault equation while clearly separating it from eGFR and medication-dosing decisions. Centor and McIsaac Score Calculator Add the documented sore-throat findings and choose the classic Centor or age-adjusted McIsaac model for a transparent screening score. CHA₂DS₂-VASc Score Calculator Calculate the documented CHA₂DS₂-VASc stroke-risk score with visible age, prior-stroke, vascular-disease, and sex-category points. HAS-BLED Bleeding Risk Score Calculator Add the HAS-BLED bleeding-risk components with separate renal, liver, age, INR, medication, and alcohol inputs and a modifiable-risk reminder. HEART Score Calculator Combine already-scored history, ECG, age, risk-factor, and troponin components into a transparent HEART score for appropriate clinical review. CURB-65 Pneumonia Severity Score Calculator Calculate the five-point CURB-65 structure from confusion, urea, respiratory rate, blood pressure, and age while keeping disposition decisions with clinicians. Absolute Neutrophil Count (ANC) Calculator Calculate the absolute neutrophil count from the white-cell count, segmented neutrophils, and bands while keeping units and interpretation boundaries visible. Albumin-Adjusted Calcium (Payne Formula) Calculator Estimate albumin-adjusted total calcium with the classic Payne equation while showing why ionized calcium and local laboratory methods still matter. BUN-to-Creatinine Ratio Calculator Calculate the BUN-to-creatinine ratio in conventional or SI laboratory units and show the normalized values used in the comparison. Fick Cardiac Output Calculator Estimate cardiac output and cardiac index from oxygen consumption and arterial-venous oxygen content difference using the Fick principle. Bicarbonate Deficit Estimate Calculator Estimate a bicarbonate-equivalent amount from body weight, base deficit, distribution factor, and a selected correction fraction while keeping medication decisions out of the result. Dog Life-Expectancy Range Calculator Estimate a dog’s remaining years from an entered age and a user-supplied lifespan range without presenting a breed or health prognosis. Menstrual Product Cost Comparison Calculator Compare recurring disposable-product costs with the monthly equivalent of a reusable option using your own prices and care assumptions. Intake and Output Totals Shift intake, output, and net fluid balance from comma lists. Clinical Unit Conversions Bedside mass, temperature, and dose conversions within families. Reconstitution Mix Volume Draw-up volume for a reconstituted vial dose. Body Fat Estimate Estimate adult body-fat percentage from height and circumference measurements using the U.S. Navy equations. TDEE Calculator Estimate resting energy and total daily energy expenditure with Mifflin-St Jeor or Katch-McArdle assumptions. Macronutrient Planning Calculator Turn an adult energy estimate into transparent planning amounts for protein, fat, and carbohydrate. Pregnancy Weight Gain Reference Show singleton-pregnancy weight-gain ranges from pre-pregnancy BMI and gestational week. Child Height Prediction Estimate Estimate mid-parental height and an illustrative range from the parents' heights. One Rep Max Calculator Estimate one-repetition maximum from a submaximal lift using Epley, Brzycki, or Lombardi. eGFR Calculator Estimate adult eGFR with the 2021 CKD-EPI creatinine equation without a race coefficient. BAC Estimate Estimate blood alcohol concentration with a transparent Widmark-style planning equation. Calories Burned Estimate Estimate activity energy expenditure from body mass, duration, and a selected MET value.

Average, Median, and Summary Calculator Summarize a numeric list with its arithmetic mean, median, sum, count, minimum, and maximum. Standard Deviation and Variance Calculator Measure data spread using population or sample standard deviation, with variance and mean. Independent Events Probability Calculator Find the probabilities of both, either, exactly one, or neither of two independent events. Combinations Calculator Count unordered selections of r distinct items from n items without replacement. Z-Score Calculator Express an observation's distance from a mean in standard-deviation units. Permutations Calculator Count ordered arrangements of r distinct items chosen from n. Five-Number Summary and Outliers Minimum, quartiles, median, maximum, IQR, and outlier fences for a data list. Normal CDF (Area Below z) Cumulative standard-normal probability for a z-score, accurate to about 1e-7. Confidence Interval for a Mean Two-sided z-interval for a population mean from sample mean, sd, and size. Correlation Coefficient (r) Pearson correlation between two equal-length numeric lists. Binomial Probability Exact and cumulative probabilities for a fixed number of independent trials. Confidence Interval for a Proportion Wald 95/90/99% interval for a population share from successes and trials. Sample Size for a Mean Respondents needed to hit a margin of error at 90/95/99% confidence. Least-Squares Regression Line Slope, intercept, and fitted equation for paired data. Poisson Probability Exact and cumulative probabilities for counted events at a known average rate. Expected Value (Discrete) Mean outcome of a gamble or lottery from values and probabilities. Sample Size for a Proportion Estimate how many observations a survey needs for a target proportion margin of error and confidence level. Summary Statistics Calculator Find the count, mean, median, mode, and range of a numeric list. Variance and Standard Deviation Calculator Calculate population and sample variance and standard deviation from a numeric list. Binomial Probability Calculator Find the probability of exactly k successes in n independent trials with a fixed success probability. Poisson Probability Calculator Calculate the probability of exactly k events for a Poisson process with a known mean rate. Conditional Probability Calculator Calculate the probability of an event given another event from their joint and conditioning probabilities. Coefficient of Determination Calculator Square a correlation coefficient to express the proportion of linear variation represented by the fitted relationship. Birthday Collision Probability Calculator Calculate the probability that at least two people share a birthday under a uniform-day model. Weighted Average Calculator Calculate a weighted average from comma-separated values and matching nonnegative weights. Moving Average Calculator Calculate simple moving averages from a comma-separated sequence and a selected window size. Acceptance Rate Calculator Calculate acceptance and rejection percentages from the number accepted and the total number of applications or trials. Cohen's d Effect Size Calculator Calculate the standardized mean difference between two independent groups using pooled sample standard deviation. Class Width Calculator Calculate equal histogram class width from a lower boundary, upper boundary, and number of classes. Six-Sided Dice Sum Probability Calculator Calculate the exact probability of a target sum when rolling a selected number of fair six-sided dice. 90% Mean Confidence Interval Calculator Calculate a normal-approximation 90% confidence interval for a sample mean from standard deviation and sample size. 95% Mean Confidence Interval Calculator Calculate a normal-approximation 95% confidence interval for a sample mean from standard deviation and sample size. 99% Mean Confidence Interval Calculator Calculate a normal-approximation 99% confidence interval for a sample mean from standard deviation and sample size. Absolute and Relative Uncertainty Calculator Calculate relative and percentage uncertainty from a measured value and an absolute uncertainty. Classification Accuracy Calculator Calculate accuracy from correct classifications and total evaluated cases. Independent AND Probability Calculator Calculate the probability that two independent events both occur. One-Way ANOVA F Statistic Calculator Calculate between-group and within-group mean squares and the one-way ANOVA F statistic from summary sums of squares and degrees of freedom. Ascending Numeric Order Calculator Parse a short comma- or space-separated list of numbers and return it in ascending order. Bayes Theorem Posterior Probability Calculator Calculate a posterior probability from prior probability, sensitivity, and specificity. Benford First-Digit Probability Calculator Calculate the expected first-digit probability under Benford's logarithmic distribution. Binomial Exact Probability Calculator Calculate the probability of exactly k successes in n independent Bernoulli trials. Five-Number Box Plot Summary Calculator Calculate minimum, first quartile, median, third quartile, and maximum from a numeric list using Tukey hinges. Central Limit Theorem Standard Error Calculator Estimate the standard error and normal-approximation interval for a sample mean. Chebyshev Theorem Coverage Calculator Calculate the guaranteed minimum fraction within k standard deviations of a mean. Exact Coin-Flip Count Probability Calculator Calculate the probability of exactly a selected number of heads in fair coin flips. Confusion Matrix Metrics Calculator Calculate accuracy, precision, recall, specificity, and F1 score from a binary confusion matrix. Normal Continuity Correction Calculator Apply a half-unit continuity correction to a discrete count boundary and convert it to a normal z score. Decile from Numeric Data Calculator Estimate a selected decile from a numeric list using linear interpolation of the sorted positions. Custom Dice Sum Probability Calculator Calculate an exact target-sum probability for a selected number of fair dice with a selected number of sides. Two-Proportion A/B Test Z-Score Calculator Compare two independent proportions with a pooled two-proportion z statistic. Beta Distribution Density Calculator Evaluate the beta probability density and mean for a selected shape pair and value. Chi-Square Goodness-of-Fit Statistic Calculator Calculate a chi-square goodness-of-fit statistic and degrees of freedom from observed and expected counts. Coin Flip Streak Probability Calculator Calculate the probability of seeing at least one run of consecutive heads in fair coin flips. One-Way ANOVA Degrees of Freedom Calculator Calculate total, between-group, and within-group degrees of freedom from sample size and group count. Descriptive Statistics Summary Calculator Calculate population-style mean, median, range, variance, and standard deviation for a finite numeric list. Independent Groups Standardized Difference Calculator Calculate the standardized mean difference between two independent groups using a pooled standard deviation. Independent Measurement Error Propagation Calculator Estimate propagated absolute uncertainty for addition, subtraction, multiplication, or division of two measured values. First Quartile Calculator Calculate the 25th percentile from a finite numeric list using linear interpolation on sorted positions. Grouped Frequency Distribution Calculator Group a finite numeric list into equal-width bins and count the values in each interval. Decimal Odds Implied Probability Calculator Convert decimal odds greater than one into implied probability and percentage. Normal Distribution Point Calculator Calculate a z score, density, and cumulative probability for a point under a normal distribution. Sample Proportion and Standard Error Calculator Calculate a sample proportion and its simple binomial standard error from successes and trials. Two-Sided Normal Z P-Value Calculator Calculate the two-sided standard-normal tail probability associated with a z statistic. Mean Median and Mode Calculator Calculate mean, median, and repeated-value mode information for a finite numeric list. Probability to Odds Calculator Convert a probability below one into odds in favor and log-odds. IQR Outlier Fence Calculator Calculate Tukey outlier fences and classify one value using first and third quartiles. Poisson Exact Count Probability Calculator Calculate the exact probability of observing a selected event count under a Poisson rate model. Mean Squared Error and RMSE Calculator Calculate mean squared error and root mean squared error from equal-length actual and predicted lists. Relative and Percentage Error Calculator Calculate signed relative error and absolute percentage error from an actual value and a nonzero reference. Bertrand Box Conditional Probability Calculator Calculate the probability that a selected coin is gold on the other side after observing a gold face in a three-box paradox model. Boy-or-Girl Conditional Probability Calculator Calculate the probability that both children are girls after a selected at-least-one-girl observation model. Cubic Prediction Polynomial Calculator Evaluate a cubic prediction equation from four supplied coefficients and an input x value. Decimal Odds Probability and Payout Calculator Convert decimal odds to implied probability and calculate total payout and net profit from a stake. Exponential Model Prediction Calculator Evaluate an exponential prediction model from a starting value, continuous rate, and elapsed time. False Positive and Predictive Value Calculator Calculate false-positive rate, positive predictive value, and false discovery rate from prevalence, sensitivity, and specificity. Five-Star Rating Summary Calculator Calculate review count, average star rating, and share of four-or-five-star ratings from star counts. Index of Qualitative Variation Calculator Calculate the index of qualitative variation from category counts. Lower Outlier Fence Calculator Calculate interquartile range and the lower Tukey outlier fence from first and third quartiles. Matthews Correlation Coefficient Calculator Calculate the Matthews correlation coefficient from binary-classification confusion counts. McNemar Paired Proportion Statistic Calculator Calculate the continuity-corrected McNemar chi-square statistic from discordant paired counts. Monty Hall Switching Probability Calculator Calculate stay and switch win probabilities for a generalized Monty Hall game with one prize door. Two-Game Mixed Win-Rate Calculator Calculate the expected win probability for a random mix of two independent games. Proportion Point Estimate Calculator Calculate a sample proportion point estimate and its complement from successes and trials. Process Capability Cp and Cpk Calculator Calculate Cp and Cpk from specification limits, process mean, and process standard deviation. Rayleigh Distribution PDF and CDF Calculator Calculate the probability density, cumulative probability, mean, and standard deviation for a Rayleigh value. Prediction Residual Calculator Calculate signed residual, absolute residual, and squared residual from observed and predicted values. Relative Standard Deviation Calculator Calculate relative standard deviation as a ratio and percentage from standard deviation and mean. Sampling Error Difference Calculator Calculate the signed sampling error between a sample proportion and a supplied population proportion. Expected Risk and Loss Calculator Calculate expected loss from event probability and loss amount, with the complement probability shown. Percentile from a Data List Calculator Estimate a percentile from a sorted or unsorted numeric list using linear interpolation between observations. Interquartile Range Calculator Calculate the interquartile range and midhinge from supplied first and third quartiles. Upper Tukey Fence Calculator Calculate the upper exploratory fence from first and third quartiles using the 1.5-IQR convention. Percentile Rank Calculator Estimate the percentile rank of a target value within a numeric data list, including a transparent tie convention. Trimmed Mean Calculator Calculate a two-sided trimmed mean by removing the same percentage of low and high observations. Mean Absolute Deviation Calculator Calculate the arithmetic mean and the average absolute distance from that mean. Coefficient of Variation Calculator Calculate relative spread by dividing population standard deviation by the absolute arithmetic mean. Standard Error of the Mean Calculator Calculate the standard error and variance of a sample mean from a standard deviation and sample size. Pooled Variance Calculator Calculate pooled variance and pooled standard deviation for two independent groups. Welch Degrees of Freedom Calculator Calculate the Welch–Satterthwaite degrees of freedom for an unequal-variance two-sample mean comparison. Discrete Expected Value Calculator Calculate the expected value and variance of a discrete distribution from paired outcomes and probabilities. Binomial Mean and Variance Calculator Calculate the expected successes, variance, and standard deviation for a binomial model. Geometric Waiting-Time Mean Calculator Calculate the mean and variance of the number of trials until the first success in a geometric model. Odds Ratio from a Two-by-Two Table Calculator Calculate the odds ratio and its natural logarithm from four cells in a two-by-two comparison table. Relative Risk from a Two-by-Two Table Calculator Calculate event risk in two groups and their relative risk from a two-by-two table. Pearson Median Skewness Calculator Calculate Pearson’s second skewness coefficient from the mean, median, and standard deviation. Pooled Two-Sample Degrees of Freedom Calculator Calculate the pooled degrees of freedom for an independent two-sample comparison. Glass’s Delta Effect Size Calculator Calculate Glass’s delta using the control-group standard deviation as the reference scale. Empirical Rule Interval Calculator Calculate one-, two-, and three-standard-deviation intervals and their normal-model coverage percentages. Independent Sum Error Propagation Calculator Calculate the combined absolute and relative uncertainty for a sum or difference of two measured quantities. F-Statistic Calculator Calculate the ratio of two entered variances for a simple F-statistic scenario. Joint Probability Calculator Calculate independent and conditional joint probabilities from event A and event B inputs. Lognormal Distribution Calculator Calculate lognormal density, cumulative probability, reliability, mean, and median from a median scale and shape parameter. Margin of Error Calculator Calculate a normal-approximation margin of error from a critical value, standard deviation, and sample size. Binomial Normal Approximation Calculator Estimate an inclusive binomial count probability using a normal approximation with an optional continuity correction. Sampling Distribution Probability Calculator Calculate the probability that a sample mean falls between two bounds under a normal sampling-distribution assumption. One-Sample Normal Power Calculator Estimate one-sided or two-sided normal-test power from an effect, standard deviation, significance level, and sample size. Three Independent Events Probability Calculator Calculate the probability that three independent events all occur, at least one occurs, or none occurs. Quadratic Regression Calculator Fit a least-squares quadratic y=a+bx+cx² to paired data and evaluate the fitted equation at a target x. Relative Frequency Calculator Convert an observed count into a relative frequency, percentage, and complement within a stated total. Shannon Entropy Calculator Calculate Shannon entropy in bits and min-entropy from a finite probability distribution. Population Skewness Calculator Calculate the Fisher-Pearson population skewness of a finite list of observations. One-Sample t-Statistic Calculator Calculate a one-sample t statistic, standard error, and degrees of freedom from summary statistics. Two-Sample t-Test Statistic Calculator Calculate a two-sample t statistic using either a pooled-variance or Welch unequal-variance standard error. Mann-Whitney U Statistic Calculator Rank two independent samples, calculate the Mann-Whitney U statistics, and show a normal-approximation z score. Weibull Distribution Calculator Calculate Weibull density, cumulative probability, reliability, and mean from shape, scale, and evaluation value. Youden's J Index Calculator Calculate Youden's J from sensitivity and specificity for a binary classification threshold. One-Sample z-Test Statistic Calculator Calculate a one-sample z statistic and two-sided normal p-value when a population standard deviation is supplied. False Positive Base-Rate Calculator Calculate positive predictive value and negative predictive value from prevalence, sensitivity, and false-positive rate. Normal Critical Value Calculator Calculate the two-sided standard-normal critical value for an entered confidence level. Simpson Diversity Index Calculator Calculate Simpson concentration and Gini-Simpson diversity from category counts. Fisher's Exact Test Calculator Calculate an exact two-sided Fisher probability for a 2×2 contingency table with fixed margins. Grouped Data Standard Deviation Calculator Estimate weighted mean and population or sample standard deviation from class midpoints and frequencies. Midrange Calculator Calculate the minimum, maximum, range, and midrange of a numeric data list. Moneyline Odds Calculator Convert a positive or negative moneyline into implied probability, decimal odds, and profit on a fixed stake. OR Probability Calculator Calculate the probability of at least one of two events, exactly one event, and neither event from an overlap. Quartic Regression Calculator Fit a fourth-degree least-squares polynomial to paired data and evaluate it at a target value. Relative Standard Error Calculator Calculate the standard error and relative standard error of a sample mean from a data list. Sum of Squares Calculator Calculate the squared-deviation total, mean squared deviation, and root-mean-square distance from a reference value. Two-Envelope Scenario Calculator Evaluate a transparent two-envelope switching scenario under explicit up/down ratios and a stated probability. Upper Control Limit Calculator Calculate center, upper, and lower three-sigma-style limits for a sample-mean control chart. Raw Score Calculator Convert a z-score into a raw score using a supplied mean and standard deviation. Fractional Odds Calculator Convert fractional odds into decimal odds, implied probability, and profit on a fixed stake. Roulette Payout and House Edge Calculator Estimate win probability, payout, expected net result, and house edge for straight-up or even-money roulette bets. Sample Proportion Probability Calculator Calculate the normal-approximation probability that a sample proportion falls between two bounds. Pie Chart Angle Calculator Convert a category count within a total into a percentage and the central angle for a pie-chart slice. Range Calculator Calculate the minimum, maximum, and total range of a numeric data list. Two-Set Venn Count Calculator Calculate A-only, B-only, union, overlap, and neither counts for two sets inside a stated universe. Five-Number Summary Calculator Sort five observations and report the minimum, first quartile, median, third quartile, and maximum. Combinations Without Repetition Calculator Count how many unordered groups of a chosen size can be selected from a finite set without repeating an item. Mean Confidence Interval Calculator Build a two-sided mean confidence interval from a sample mean, standard deviation, sample size, and supplied critical value. Range and Relative Dispersion Calculator Calculate the range, midrange, and coefficient of range from a positive minimum and maximum. Interquartile Spread (IQR) Calculator Find the interquartile range, midhinge, and quartile spread from the first and third quartiles. Mean Absolute Deviation for Five Values Calculate the mean, mean absolute deviation, and largest absolute deviation for five observations. Median Calculator for Five Values Sort five numeric values and calculate their median, mean, and distance between the extreme values. Minimum, Maximum, and Range Calculator Calculate the span, midpoint, and endpoint ratio from a minimum and maximum observation. Mode Calculator for Five Values Find the unique most frequent value in a five-observation dataset and report its frequency and share. Permutation Calculator Count ordered selections of r distinct items from n available items without repetition. Pooled Standard Deviation Calculator Combine two sample standard deviations using their degrees of freedom to estimate a common pooled spread. Population Variance Calculator Calculate the population mean, population variance, standard deviation, and root-mean-square value for five values. Probability from Favorable Outcomes Convert favorable and total equally likely outcomes into probability, percentage, complement, and odds. Quartile Calculator for Nine Values Sort nine observations and calculate Q1, median, Q3, interquartile range, and the quartile midhinge. Sensitivity Calculator Calculate sensitivity, miss rate, and the number of actual positive cases from true positives and false negatives. Specificity Calculator Calculate specificity, false-positive rate, and the number of actual negative cases from true negatives and false positives. Sensitivity and Specificity Calculator Summarize all four cells of a binary classification table with sensitivity, specificity, accuracy, and prevalence. Sampling Standard Error Calculator Calculate the standard error of a sample mean and an illustrative 95% normal-approximation margin. Two-Dice Sum Probability Calculator Calculate the number of ordered outcomes, probability, percentage, and complement for a target sum from two fair six-sided dice. Measurement Uncertainty Calculator Convert an absolute measurement uncertainty into relative uncertainty, percent uncertainty, and an interval around a measured value. Journal Impact Factor Arithmetic Calculator Calculate the two-year citation rate used in a journal impact-factor style summary from citations and scholarly items, while keeping the metric's scope clear. Third Quartile Calculator Sort a raw dataset and calculate its third quartile, median, first quartile, and interquartile range using a stated median-of-halves convention. Upper and Lower Outlier Fence Calculator Calculate the lower and upper Tukey-style outlier fences from Q1, Q3, and an entered IQR multiplier. Sample or Population Variance Calculator Calculate variance and standard deviation from a pasted dataset while keeping the population or sample divisor explicit. Standard Deviation and Standard Error from Data Calculate a sample standard deviation, standard error of the mean, and relative standard error from raw observations. Histogram Bin Count Calculator Group raw numeric values into equal-width histogram bins and report counts, relative frequencies, and density values. Stem-and-Leaf Plot Calculator Sort raw values into a text stem-and-leaf display while retaining the individual observations. Frequency Polygon Point Calculator Convert class midpoints and frequencies into frequency-polygon points, total frequency, and a grouped weighted mean. Dot Plot Frequency Table Calculator Count repeated values in a raw dataset and produce a sorted dot-plot table with frequencies and proportions. Ordering Numbers Calculator Sort a pasted list from least to greatest and greatest to least, and report the center and endpoints. Pie Chart Percentage Calculator Calculate a category's share, percentage, and pie-slice angle from a category count and total count. Wilcoxon Rank-Sum Statistic Rank two independent samples, calculate the Wilcoxon rank-sum and U statistics, and show a large-sample normal approximation. Inverse Normal Distribution Calculator Find the normal-distribution value at a chosen cumulative percentile from a mean and standard deviation. Post-Test Probability Calculator Use prevalence, sensitivity, and specificity to estimate positive and negative post-test probabilities with Bayes' theorem. One-Sample z Hypothesis Test Calculator Calculate a one-sample z statistic and tail-specific p-value when the population standard deviation is supplied. Least-Squares Linear Regression Calculator Fit a straight line to paired observations and report the slope, intercept, prediction, correlation, and explained variation. Password Combination Calculator Count the exact number of passwords possible from an alphabet size and length, with or without character reuse. Fair Coin Heads Probability Calculator Calculate the probability of an exact or at-least number of heads in repeated fair-coin flips, plus the expected count and spread. Expected Dice Average Calculator Calculate the expected value, variance, standard deviation, and possible range for a sum of fair identical dice. Pie Chart Slice Calculator Turn a list of category values into totals, percentages, and central angles for a complete pie chart. Bertrand Chord Probability Model Calculator Compare the classic probabilities for a chord longer than an inscribed equilateral-triangle side under three explicit random-chord models. Scatter Plot and Linear Regression Calculator Summarize paired x and y data with a correlation coefficient, least-squares line, fitted values, and a transparent prediction. Pearson Correlation Calculator Calculate Pearson’s r, r², means, and supporting sums from paired X and Y observations entered as comma-separated values. Exponential Growth and Decay Calculator Project a positive starting value under discrete compounding or continuous exponential growth and display the change and doubling time. Polynomial Regression Calculator Fit an ordinary least-squares polynomial of degree 1 to 5 to paired observations and report the equation, R², and RMSE. Gender Pay Gap Percentage Calculator Calculate an unadjusted pay gap, comparison-group pay share, and absolute difference from two user-entered earnings figures without bundling stale country data. Lottery Match Probability Calculator Calculate the chance of meeting a chosen lottery match threshold from a pool, ticket size, draw size, and number of tickets without assuming a particular country's game rules. Inverse Standard Normal (z Quantile) Finds the z-score with a given left-tail area under the standard normal curve. Chi-Square Goodness of Fit Tests counts against expected counts with the Pearson chi-square statistic. Empirical Rule Bands 68-95-99.7% intervals from mean and standard deviation. Confidence Interval for a Mean (t) t-interval for the mean when sigma is unknown. Bayes Flip P(A|B) Flips P(B|A) into P(A|B) from the base rate and evidence rate. Root Mean Square Calculate the root mean square of a bounded list of numeric values. Geometric Mean Calculate the geometric mean of a list of positive values using logarithmic accumulation for stability. Harmonic Mean Calculate the harmonic mean of a list of positive values. Bonferroni Correction Calculate a Bonferroni-adjusted significance threshold and adjusted p-value for multiple comparisons. Coefficient of Variation Calculate the sample standard deviation relative to a positive sample mean. Sample Covariance Calculate the sample covariance of two equal-length paired data sets. Spearman Rank Correlation Calculate Spearman's rank correlation for two paired data sets, including average ranks for ties. Geometric Distribution Calculate the probability that the first success occurs on a selected trial and the cumulative probability by that trial. Negative Binomial Distribution Calculate the probability of observing a selected number of failures before a specified number of successes. Median Absolute Deviation Calculate the median and raw median absolute deviation of a numeric sample. Combinations With Repetition Count unordered selections of a fixed size from reusable types, where selecting the same type more than once is allowed. Permutations With Repetition Count ordered sequences of a fixed length from reusable types, where each position may use any type again. Hypergeometric Distribution Calculate an exact and cumulative probability for successes drawn without replacement from a finite population. Continuous Uniform Distribution Evaluate the density and cumulative probability of a continuous uniform variable on a finite interval, with its mean and variance. Exponential Distribution Evaluate the density, cumulative probability, survival probability, mean, and variance of an exponential waiting-time model.

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.