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Trailing Twelve Months (TTM) Calculator — result sheet
Sum twelve consecutive monthly financial values and compare the latest six months with the preceding six months.
Inputs used
Results
Visual chart
Breakdown
Calculation steps
Returned data table
Formula and methodology
Formula: TTM total = x₁+x₂+…+x₁₂; six-month comparison = (x₇+…+x₁₂) − (x₁+…+x₆); percentage change = comparison ÷ first-six-month total when that denominator is nonzero.
Trailing twelve months is a rolling period rather than a calendar-year label. This calculator keeps the twelve entered values in chronological order, sums them, reports the monthly average, and compares the most recent six months with the first six months in the same window. It can be used for revenue, expenses, units, or another clearly defined monthly metric, but the result inherits the accounting definition and period consistency of the inputs.
This result follows the calculator's declared inputs, precision, validation boundaries, and model limits.
Input contract
- Twelve monthly values — Enter exactly 12 finite numbers in chronological order, separated by commas or spaces.
Worked example
| Input | Value |
|---|---|
| Twelve monthly values | 100000, 105000, 98000, 110000, 115000, 120000, 125000, 130000, 128000, 135000, 140000, 145000 |
TTM total = 1,451,000; monthly average = 120,916.67; latest six months are 96,000 higher than the first six, or about 16.62% higher.
Assumptions and limits
- Exactly twelve values are supplied in chronological order and all values use the same unit, currency, accounting scope, and reporting period.
- The final six entries represent the latest half of the selected rolling window; the first six represent the preceding half.
- Values may be signed so refunds, credits, or adjustments can be represented, but the user must define the metric before interpreting the sum.
- The percentage comparison is omitted when the first-six-month total is zero because a relative change would be undefined.
- TTM is not automatically a fiscal year, a forecast, a seasonally adjusted figure, or a valuation conclusion.
- The calculator does not normalize acquisitions, divestitures, currency changes, restatements, missing periods, or accounting policy differences.
Calculator note
Source and methodology
Use the official WorldCalculate methodology policy for the source, formula, precision, and boundary standards behind this calculator.
Planning estimate, not financial, medical, legal, or professional advice. © WorldCalculate — reuse with attribution. Built and curated by Hassan ALRowaie.
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