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Age Calculator
Work out your exact age in years, months and days from any birth date, plus the total days.
Calculate an age
Age: —
Total days lived: —
Next birthday in: —
How to use the Age Calculator
- Pick your date of birth in the first field.
- Leave the second date as today, or change it to measure age at another date.
- The exact age, total days and next birthday countdown appear immediately.
Features
- Exact age in years, months and days
- Total days lived
- Countdown to the next birthday
- Any past or future reference date
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Frequently Asked Questions
Common questions about the free online age calculator.
The tool compares your birth date with the reference date, borrowing days and months where
needed, so the result is exact rather than an estimate.
That breakdown matches how people normally state their age and avoids the rounding errors of
dividing total days by 365.
Yes. Change the second date to any date and the age is recalculated for that moment.
It is the exact number of calendar days between the two dates, so leap days are included.
If you were born on 29 February, the countdown uses 1 March in years that are not leap years.
No. Both dates are read as local calendar dates, so a midnight or time zone difference does
not shift the answer.
No. Both dates stay in your browser and nothing is transmitted.
Yes. It is completely free and unlimited, with no account, no sign-up and no usage caps.
Last updated: October 10, 2026