Age Calculator

Your age is worked out with real calendar math: full years first, then remaining months, then remaining days. When the day or month of the birth date hasn't arrived yet this year, we "borrow" — just like on paper — using the actual number of days in each month, so the result is exact down to the day.

Subtracting birth years assumes you've already had your birthday this year. If your birthday hasn't come around yet, you're still one year younger than the simple subtraction suggests. This calculator checks the full date, so it always gives the age you actually are today.

Yes. The calculation uses real calendar dates, so leap days (like February 29) are counted exactly when they occur. If you were born on February 29, your next birthday is shown on February 28 in non-leap years.