Age Calculator
Exact age in years, months and days, plus your next birthday.
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About this age calculator
Enter a date of birth to get an exact age in years, months and days. You can also pick a different “as of” date to find someone's age on a past or future date, and see how many days remain until the next birthday.
How to use it
- 1Enter the date of birth.
- 2Optionally choose an “as of” date (defaults to today).
- 3See the exact age, total days and next birthday countdown.
Frequently asked questions
How is exact age calculated?+
We count full years since the birth date, then full months since the last birthday, then the remaining days — the same way ages are counted on official documents.
Can I calculate age on a specific date?+
Yes. Change the “as of” date to any past or future date to see the age on that day.
What about people born on 29 February?+
In non-leap years their birthday is treated as 1 March for the next-birthday countdown.