Age Calculator
Enter a date of birth to get an exact age. Change the "age on" date to calculate age at any point.
How is exact age calculated?
How is exact age calculated? Count full years since the birth date, then full months since the last birthday, then the remaining days. For example, someone born 15 May 1990 is 36 years, 4 months and 8 days old on 23 September 2026.
How to use the age calculator
- Enter the date of birth.
- Leave "Age on" as today, or pick another date.
- Read the age and extra details.
Features
- Years, months and days
- Totals in months, weeks and days
- Next birthday countdown
- Leap-day birthdays handled (celebrated on 28 February in common years)
Good for
- Checking eligibility ages
- Forms that ask for age in months
- Curiosity: how many days old you are
Frequently asked questions
How are 29 February birthdays handled?
In years without a 29 February, the next birthday is shown as 28 February. Some people and some legal systems use 1 March instead.
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