Age calculator

The calculator counts full years first, then full months, then the remaining days from your date of birth to the chosen date. That's the same way people normally state their age.

Example: born on May 15, 1990, age on November 13, 2026 = 36 years, 5 months and 29 days. From May 15, 1990, 36 years brings you to May 15, 2026; 5 more months to October 15, 2026; and 29 more days to November 13.

The table also shows your age as a single number in months, weeks, days and approximate hours, which is fun for milestones like your 10,000th day (about 27 years and 4 months).

Change the second date to find out how old someone was or will be on a particular day. This is useful for:

• eligibility rules: age on a cutoff date for school, sports leagues or insurance,
• forms that ask for age at the time of an event,
• planning milestone birthdays,
• genealogy: age at marriage, at a child's birth or at death.

If you were born on February 29, your birthday only appears on the calendar in leap years. In other years, the calculator treats March 1 as the day you turn a year older. That's a common convention, but legal rules can differ, so check them if it matters for a contract, license or benefit.

The table shows the weekday you were born on and the date and weekday of your next birthday, with the number of days to go. On your birthday it wishes you a happy birthday instead.

To count the days between any two dates, use the date calculator. To see what weekday a birthday will fall on in the coming years, try the day of the week calculator. The age calculator uses calendar dates only, so time zones don't affect the result, and your date of birth never leaves your browser.