Math calculator
Permutation & Combination Calculator
Calculate ordered permutations and unordered combinations from n items.
How this calculation works
nPr = n!/(n−r)!; nCr = n!/(r!(n−r)!) Use the calculator above to enter your values. Inputs are checked before a result is shown, and calculations run locally in your browser.
Example: 5 choose 2 = 10 combinations; 20 permutations Results are rounded for display where needed.
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