Age Calculator

This age calculator helps you find your exact age in years, months, and days. Simply enter your date of birth and click Calculate. You’ll also see how many days you have lived and how many days remain until your next birthday.

Age is calculated using calendar-accurate date math (not rough approximations), so it correctly handles month lengths and leap years. You can also choose an optional “As of” date to calculate age at any specific date.

How is age calculated? We use calendar-accurate date math from your birth date and the optional "As of" date.

Does this handle leap years? Yes, leap years and month lengths are handled correctly.