Age Calculator

Enter a date of birth to get an exact age in years, months and days.

Age

Your date of birth stays on your device; it is never sent anywhere.

How age is calculated

Age is counted in completed years, then completed months, then the remaining days. For example, someone born on March 20, 2000 is 25 years, 11 months and 16 days old on March 8, 2026. When the day of the month hasn't been reached yet, the calculator borrows the number of days in the previous month, which is the same way people count age by hand.

Leap-day birthdays

If you were born on February 29, your birthday is shown as February 28 in years without a leap day. Some countries legally use March 1 instead; check your local rules if it matters for a legal age.

Uses for an age calculator

Frequently asked questions

How do I calculate my age on a specific date?

Change the "Age at the date of" field to any date, past or future.

How many days old am I?

The "Total days" figure shows the exact number of days since your date of birth.

Is my birth date stored?

It is saved only in your own browser so it is there next time you visit. It is never sent to a server.

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