Calculate exact age from a date of birth
Enter a date of birth and the tool works out the age in years, months and days, the days lived and how long until the next birthday. You can also change the reference date.
Good to know
- By default it calculates the age as of today; you can set another reference date.
- It shows years, months and days, days lived and the next birthday.
- Someone born on 29 February has their birthday on 1 March in non-leap years; conventions vary.
- The date never leaves your browser.
Full guide to the tool: Age calculator.
Frequently asked questions
Can I calculate the age I will be on another date?
Yes. Change the reference date (today by default) and you will see the exact age on that date.
What about someone born on 29 February?
In non-leap years 1 March is taken as the birthday, although conventions vary by country or procedure.
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