Age Difference Calculator
Find the exact age gap between two people, in years, months and days.
Age Difference
5y 0m 0d
How This Works
This calculates the true calendar gap between two birth dates — years, months and days — the same way you'd count it by hand, correctly handling different month lengths and leap years.
Formula
Age Difference = Later Birth Date − Earlier Birth Date
Example
A parent born in 1985 and a child born in 2015 have a 30-year age gap.
Frequently Asked Questions
What is the age difference between someone born January 1, 1985 and January 1, 1990?
The age difference is 5 years, 0 months and 0 days.