How age is calculated
We count full years first, then full months, then the remaining days — the same way age is counted on official documents. For people born on 29 February, the next birthday in a non-leap year is shown as 28 February.
Frequently asked questions
Can I calculate age on a past or future date?
Yes. Change the “Age on” date to find out how old someone was — or will be — on any day.
Is my birth date stored?
No. Calculations run in your browser and nothing is sent to a server.