Birth year by age

What Year Were You Born If You Are 100?

If you are 100 years old in 2026, you were born in 1925 or 1926, depending on whether your birthday has passed.

If you are 100 years old in 2026, your birth year is:

1925 or 1926

Born in 1926 if your birthday has already occurred this year; otherwise, born in 1925.

Current age100

Possible birth years1925–1926

Turns this age during2026

What year were you born if you are 100?

Subtract 100 from 2026. The result is 1926. If your birthday is still coming up in 2026, your birth year is one year earlier: 1925.

Why the answer can be two different years

Age changes on a birthday, not on January 1. Without your birth month and day, both 1925 and 1926 are possible. Use the exact calculator to resolve the date precisely.