Education

Permutations & Combinations Calculator

nPr, nCr, and both with repetition — exact for big numbers.

Education

Local only

n (total items)r (chosen)

Everything stays in your browser

Your text is processed on your device — nothing is uploaded to a server.

How it works

Uses exact big-integer factorials.

Good to know

How do I use it?

Fill in the options and press “Calculate”. Check the result, then copy or download it.

How does it work?

Uses exact big-integer factorials.

Is my data uploaded?

No. Everything is processed in your browser and nothing is sent to a server. No account is needed.