How to use Age calculator
- Enter the date of birth.
- Change Age on if you want the age at another date.
- Read the result and the totals.
Questions
How is age calculated?
Full years are counted first, then full months, then the remaining days, the same way ages are counted on official forms.
What about birthdays on 29 February?
In years without a 29 February, the next birthday is shown as 1 March.
Last updated 13 November 2026.