Combinations and Permutations Calculator (nCr / nPr)
- nCr (combinations)
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- nPr (permutations)
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nCr = n! / (r!(n-r)!) — order doesn't matter. nPr = n! / (n-r)! — order matters.
About this tool
Combinations and Permutations Calculator (nCr / nPr) is a single-purpose utility on instant.tw, a free toolbox of calculators, converters, generators, and quick lookups. Everything works in your browser — nothing is uploaded, nothing is stored on a server unless explicitly noted.
Category: Math — Advanced. Browse more Math — Advanced tools.