Permutation and Combination Calculator

Find nPr and nCr counts using exact integer arithmetic for common counting problems.

Total items n

Chosen items r

Order

Repetition

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—Digits in exact result

—Scientific preview

—Input status

—Counting model

How to use this Permutation and Combination Calculator

Calculate permutations and combinations with or without repetition. Enter your values above and the result is calculated directly in your browser. No account is required.

Fast answer, clear inputs

This tool is built around one job: give the answer quickly without forcing a signup or hiding the result. Related tools are linked nearby when the next calculation or conversion is useful.