Age Calculator

Calculate exact age in years, months and days between two dates.

How to use

  1. Pick your date of birth.
  2. Optionally change the “as of” date (defaults to today).
  3. Click “Calculate” to see your exact age in years, months, days, and total days lived.

Frequently Asked Questions

Can I calculate age as of a future or past date?

Yes, change the “as of” date to any date after the birth date — useful for figuring out age at a specific event.

How is the day count adjusted for different month lengths?

The calculator correctly accounts for varying month lengths (28–31 days) when computing months and days.

Does it handle leap years?

Yes, the total days figure is calculated from real calendar dates, so leap years are automatically accounted for.