Age Calculator
Find an exact age in years, months, and days, and a countdown to the next birthday.
Last updated
Enter a date of birth above.
—Total days lived
—Total weeks lived
—Days to next birthday
—Born on a
About this tool
The years/months/days breakdown counts a full year only once the birth month and day have both been reached — the same convention used for legal age. Everything is computed from calendar dates only (no time-of-day or time zone involved), so the result is the same no matter where in the world you or the "as of" date are.
Nothing entered here is sent to a server — the entire calculation runs as JavaScript in your browser tab.