Age Calculator
Enter a birth date to see exact age, total days lived, and the wait until the next birthday. Optionally calculate age on any date.
Defaults to today.
Enter a birth date.
Try:
Frequently asked questions
How is age calculated?
Age is the completed years, leftover months, then leftover days from the birth date to the comparison date. Leap days are handled by the calendar, not by a 365.25-day average.
What if someone was born on 29 February?
In non-leap years the next birthday is treated as 1 March, which is how most civil calendars resolve the date.
Can I calculate age on a past or future date?
Yes. Change the “Age on” field. The comparison date must be on or after the birth date.