Age Difference Calculator

Find the exact age gap between two people — in years, months and days. Perfect for siblings, partners or friends.

First birth date

Second birth date

How is the age gap calculated?

We measure the calendar distance between the two birth dates using real month lengths and leap years — not a rough 365-day year.

Does birth order matter?

No. Enter the dates in any order; the tool sorts them and tells you who is older.

Can I compare more than two people?

Run the calculation pairwise — compare A vs B, then A vs C — to map a whole family.