Age Calculator

The years, months and days add up to the full elapsed time. The total-days figure is useful for milestones, while the next-birthday countdown counts whole days remaining.

The calculator counts full years between the dates, then the remaining whole months, then the remaining days, borrowing from the previous month length when needed. Leap years are handled automatically.

Someone born on 15 March 1990, calculated on 13 June 2026, is 36 years, 2 months and 29 days old.

1. Select the date of birth.
2. Leave the second date as today, or pick another date.
3. Press Calculate to see the exact age breakdown.

• Choosing a birth date that is later than the target date.
• Expecting months to always be 30 days — real month lengths vary.

The Age Calculator converts a date of birth into an exact age expressed in years, months and days. It also shows the total number of days lived and how long until the next birthday.