Age & Date Calculator

Calculate age, date differences, and more

Date of Birth

What is this tool?

Calculates exact age in years, months, and days from a birth date, or the number of days between any two dates.

Enter a birth date (or two dates for a general date difference), and the calculated age or interval appears immediately.

This is also useful for far more than birthdays — counting days until a deadline, or the exact duration of an event, works the same way.