Age Calculator

A passport needs a precise age. A milestone birthday is 10,000 days away. A contract asks for years and months completed. Guessing from a birth date is not good enough.

Counts completed years, not calendar boundaries

Enter a birth date and the calculator shows completed years, months and days. It also gives the total days lived and the days until the next birthday.

This matches how most official forms ask for age.

Leap years are handled automatically

February 29 births are calculated against February 28 in common years, matching the usual legal approach in many countries.

Past dates give negative age

If you enter a future date by mistake, the result will be negative or zero. Check the input before relying on it.