How old am I if I was born in 1925?
100 or 101 — 100 if your birthday is still to come in 2026, and 101 once it has passed.
There is no single answer to this question and pages that give one are wrong for about half the people who ask it. Age counts completed birthdays, so everyone born in 1925 spends part of 2026 at 100 and the rest at 101. A birth year of 1925 places you in the Greatest Generation.
Recomputed hourly against the current date · How we check
- Days lived
2026-10-01 - 1925-01-0137,163 days- Age in years
2026 - 1925 - (1 - 1)101 yr- Age in whole months
(2026 - 1925) * 12 + (10 - 1) - (0)1,221 months- Months since the last birthday
1221 - 101 * 129 months- Weeks lived
floor(37163 / 7)5,309 weeks- Hours lived
37163 * 24891,912 hours
Opened on 1 January 1925, so it shows the 101 side of the pair. Put your own date of birth in and the pair collapses to the one number that is yours.
Why the answer is a pair
Age in the US and almost everywhere else is age at last birthday: you are 100 until the day you turn 101, and then you are 101 for a year. Subtracting 1925 from 2026 gives 101, which is only right for the people whose birthday has already gone. For everyone else it is a year too high, and for anyone born on 31 December it is a year too high for all but one day of the year.
To get the single number, put your actual birthday into the calculator above. It counts completed years rather than subtracting, so it lands on the right side of the birthday.