Fun
Birthday Paradox
See how likely shared birthdays are in a group.
Probability
50.7%
There is a 0.507 chance at least two people share a birthday.
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See how likely shared birthdays are in a group.
Probability
50.7%
There is a 0.507 chance at least two people share a birthday.
Drop this calculator into your site's HTML to give your visitors instant value.