PrimeCalcPro

Age Calculator

Calculate exact age in years, months and days

Age Calculator

Leave blank for today

Variable Key

D₁= birth dateD₂= target date (today)A= age in years

Age in years

Simple year subtraction (adjusted for birthday).

Exact age in days

Total days between two dates.

An age calculator determines exactly how long a person has been alive, broken down into years, months, and days. It accounts for varying month lengths and leap years to give a precise age.

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Tip: Leap years occur every 4 years, except years divisible by 100 — unless also divisible by 400. So 2000 was a leap year, but 1900 was not.

Born: Jan 15, 1990 → Today: Apr 1, 2025=35 years, 2 months, 17 days
Born: Feb 29, 2000 (leap day) → Apr 1, 2025=25 years, 1 month, 1 dayFeb 29 birthdays count as Feb 28 in non-leap years
Year typeDaysFeb days
Regular year36528
Leap year36629

Fun Fact

If you live to age 80, you will have been alive for about 29,200 days, 700,800 hours, or over 2.5 billion seconds.

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