👥 Age Difference Calculator
Find the exact age gap between two people — in years, months, and days — from their birth dates.
Birth Dates
Result
How the Age Difference Calculator Works
This calculator finds the calendar-accurate span between two people's birth dates, showing which person is older and by how much, broken down into years, months, and days (plus total months and total days for convenience).
Formula
(Calculated the same way as age itself — the gap doesn't depend on the reference date)
Worked example: Person A born March 10, 1990 and Person B born November 22, 1993 have an age gap of 3 years, 8 months, and 12 days — Person A is older.
Frequently Asked Questions
Does the age difference change over time?
No — the age gap between two people's birth dates is fixed for life (aside from a brief window around a leap-day birthday adjustment), unlike each person's individual age, which increases every year.
Can I use this for age-gap relationship or compatibility questions?
Yes, this calculator simply reports the factual age gap in years, months, and days between any two birth dates — how you interpret that number is up to you.
Does the order I enter the two birth dates matter?
No — the calculator automatically determines which person is older and reports the gap either way, regardless of which date you enter first.