🎂 Age Calculator
Find your exact age and how long until your next birthday.
How to use the Age Calculator
- Enter a date of birth.
- Optionally change the date to calculate age on.
- Read your age and birthday countdown.
Examples
- Born 15 March 1990, calculated on 10 June 2026: 36 years, 2 months, 26 days.
Formula and method
Years and months are counted as full calendar units, then the remaining days are counted. If the day of the month is earlier than the birth day, a month is borrowed using the length of the previous month. For 29 February birthdays, the countdown uses 1 March in non-leap years.
Frequently asked questions
How are leap years handled?
Dates are calculated with the calendar, so 29 February is counted when it exists.
Is my date of birth stored?
No. The calculation runs in your browser.
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