Gestation Calculator

Calculate gestation instantly with our free Gestation Calculator. Fast, accurate, and ready whenever you need it — no sign-up.

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How the Gestation Calculator Is Calculated

Gestational age is calculated by counting the number of days elapsed since the first day of your last menstrual period, then converting that day count into completed weeks and remaining days (e.g. "20w 3d") — the standard way gestational age is expressed clinically.

About the Gestation Calculator

Calculate gestation instantly with our free Gestation Calculator. Fast, accurate, and ready whenever you need it — no sign-up.