Age Difference Calculator
Find the age gap between two people in years, months and days.
—
Dates use your device’s calendar. If you were born on 29 February, the calculator counts your birthday on 28 February in years that are not leap years.
How the age difference is calculated
age difference = later date of birth − earlier date of birth
The difference between two people never changes, so only the two dates of birth are needed. Example: someone born on 2 March 1988 is 4 years, 8 months and 18 days older than someone born on 20 November 1992 — 1,724 days.
Uses
- The age gap between partners, siblings or parents and children.
- Rules for sports or school groups that compare dates of birth.
- Family history: the gap between generations.
Frequently asked questions
How do I calculate the age difference between two people?
Subtract the earlier date of birth from the later one. The calculator shows the gap in years, months and days, and in total days.
Does the age difference change over time?
No. The gap in days stays the same. Only the gap in whole years can look different for a few weeks each year, between the two birthdays.