Comparison
How Old Was I When They Were Born?
Find the first person’s age when the second person was born.
Open tool →Comparison
Age Difference Calculator
Compare two birth dates in years, months and days and see who is older.
1
Your dates
On this deviceYour dates are remembered here for 30 days. No account needed.
2
Your story in numbers
Every date has a story.
Enter your dates to discover your result and the next dates worth keeping.
Understanding your result
Calendar durations respect month lengths. Day counts include the start and exclude the end unless selected otherwise. Civil-date intervals are not timestamp durations adjusted for daylight saving changes.
See a worked example
Illustrative example, as of September 13, 2026.
- Date of birth
- 1991-05-16
- Person B’s birth date
- 1994-08-22
3 years, 3 months, 6 days
Are my dates sent to a server?
Calculations run in your browser. Your dates stay on this device unless you choose to include them in a sharing link or image. “Clear my dates” removes them from local storage.