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Combination Calculator

Enter n and r to calculate the number of unordered combinations.

Combination nCr

How to use this Combination Calculator

Calculate combinations nCr. 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.