How rare is
your birthday?
Rarer than
Your birthday twin is out there.
The 50–50 crowd
Other people for at least a 50–50 chance of one sharing your birthday.
Someone matches your birthday
Any two of them match each other
A match somewhere in the group is much easier to find than a match with one specific birthday.
Independent draws from the U.S. sample. The group excludes you; “any two” compares people within that group. Shared month and day, regardless of year.U.S. · 1994–2014
How much data is behind this?
225.5Mrecorded births in the daily-count collection
Your main result uses 85.7M U.S. births. The wider explorer covers several countries and time periods.
- U.S. · 42 observed years
- 160,176,743
- England & Wales · 1995–2025
- 20,231,846
- Metropolitan France · 1968–2023
- 42,899,901
- France · 2025–July 2026
- 1,015,108
- Denmark · 2007–2025
- 1,145,696
225,469,294 births across 54,634 dated counts. Overlapping U.S. years are counted once. Countries, coverage and periods differ; this is a collection total, not a worldwide birthday ranking. Recent France includes a separately labeled partial year.
Also included: 4,392 famous birthdays, a snapshot of 6,025,603 Danish residents, and birth-hour patterns from 3,628,934 U.S. births in 2024. These are separate collections and are not added to the daily-count total.
Compare countries, years and more patterns →