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Statistics Calculators
Combination Calculator (nCr)
Calculate the number of combinations (nCr) — ways to choose r items from a set of n where order does not matter.
Combinations (nCr)
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About the Combination Calculator (nCr)
A combination counts the number of ways to select a group of r items from a larger set of n items when the order of selection doesn't matter — choosing {A, B} is the same as choosing {B, A}.
Formula: nCr = n! ÷ (r! × (n − r)!)
Combinations are used to calculate lottery odds, card hand possibilities, and committee selections where order is irrelevant.
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