Age Calculator
Exact age in years, months and days
Advertisement
About this calculator
Enter a date of birth and the calculator returns your exact age, counting calendar months correctly rather than dividing days by 30. It also shows the same age as total months, weeks, days and hours, and counts down to the next birthday.
The formula
Age = (as-of date) − (date of birth), borrowing days from the previous month when needed
Worked exampleBorn 15 March 2000, measured on 10 October 2026 → 26 years, 6 months, 25 days.
Frequently asked questions
Can I calculate the age on a past or future date?
Yes. Change the "Age on" date to any day and the result updates instantly.
How are leap years handled?
The calculation uses real calendar dates, so 29 February and leap years are accounted for automatically.
Is my date of birth stored?
No. Everything runs in your browser and nothing is sent anywhere.
Advertisement