How to Calculate Age

What is Age?

An age calculator determines the exact elapsed time from a birth date to today (or any target date), accounting for varying month lengths and leap years.

Step-by-Step Guide

1. 1Subtract birth year from current year to get base age
2. 2If birthday has not yet passed this year, subtract 1 from the result
3. 3For exact days: count days elapsed since last birthday
4. 4Leap years (Feb 29 birthdays) are counted as Feb 28 in non-leap years

Worked Examples