TTM calculator

Trailing twelve months, or TTM, is the sum of a metric over the most recent four fiscal quarters. Analysts, lenders, and operator finance teams use that rolling year when a fiscal year-end is stale, when they need a comparable annual figure from the latest filings, and when they want one number that does not wait for the next annual report. This TTM calculator accepts at least four quarterly values — revenue, earnings, or any other additive line in one currency — keeps the last four, and returns their sum as the trailing twelve months total.

What trailing twelve months actually adds, and why four quarters

Trailing twelve months asks a narrow question: if you line up the last four reported quarters of one additive metric, what annual figure do those four print when you add them. The identity this calculator uses is ttm equals q1 plus q2 plus q3 plus q4, where those four values are the most recent quarters you send, in chronological order with the oldest of the four first.

Revenue is the usual line — four quarters of sales become TTM revenue — but the same sum is how TTM earnings, TTM operating income, TTM free cash flow, or TTM bookings are built when the metric is additive across quarters. Four is not a convention you can skip: a calendar year has four quarters, so a stub of two or three quarters is a year-to-date figure, not a trailing year, and annualizing it by multiplying would invent growth that the filings did not show.

A one million two hundred thousand first quarter, a one million three hundred fifty thousand second quarter, a one million four hundred twenty-five thousand third quarter, and a one million five hundred thousand fourth quarter print a TTM of five million four hundred seventy-five thousand because those four addends are the entire year. Zero is a legitimate quarter and is not an error: a dry season still belongs in the trailing year.

Negative values are accepted because a loss quarter still belongs in TTM earnings; the sum follows that sign instead of hiding behind an absolute value. If you send more than four quarters, only the last four are kept — that is the trailing window — so a six-quarter history of eight hundred, nine hundred, one thousand, one thousand one hundred, one thousand two hundred, and negative fifty prints TTM from the last four only.

This calculator does not multiply last month by twelve, does not apply a growth rate, does not convert currencies, and does not look up a live filing. You supply finite quarterly numbers that already share one metric and one currency; the calculator adds the trailing four and rounds the sum half-up to two decimal places so goldens compare byte-for-byte across runtimes. This is a four-quarter TTM sum, not an exit run rate, not a fiscal-year total that waits for year-end, and not a consensus estimate.

Where a TTM calculator earns its keep

Operators closing a quarter use a trailing twelve months calculator to turn the last four reported lines into one comparable annual figure before they open a full model or a board pack. Equity analysts re-run the same four fields when a new 10-Q lands, then pin ttm next to a multiple so every memo starts from a rolling year rather than from a stale fiscal year or from a single quarter that has not been annualized honestly.

Lenders and credit committees drop four quarters of revenue or EBITDA into the identity and compare that TTM with a covenant package that is written on a trailing-twelve-month basis, rather than treating year-to-date as a substitute. Investor-relations teams put the same TTM beside an exit run rate so a data room does not confuse last-month times twelve with the sum of the last four quarters.

This is a different search and a different job from exit ARR, from a fiscal-year total, from net revenue retention, and from a simple annualization of one quarter: those tools start from different lines and answer different questions. Failed validation does not consume balance. Keep at least four finite quarters, pin the rounded TTM in tests, and you get a reproducible trailing-year figure for teasers, LMS plugins, and edge workers without standing up a general ledger of your own.