Permutation and Combination Calculator
Count arrangements and selections (nPr, nCr)
Use this when you need a fast, accurate result — no sign-up, works entirely in your browser.
Permutations nPr—
Combinations nCr—
How to Use
- Enter your details into the fields above.
- Click the calculate button to get your result instantly.
- Use the clear button to start a new calculation.
Example
- n = 10, r = 3 → Permutations (nPr) = 720, combinations (nCr) = 120
- n = 12, r = 5 → Permutations = 95,040; combinations = 792
Formula
nPr = n! ÷ (n − r)! counts ordered arrangements. nCr = n! ÷ (r! × (n − r)!) counts unordered selections, so nCr = nPr ÷ r!.
About Permutation and Combination Calculator
Count arrangements and selections (nPr, nCr). This free online tool gives you fast, accurate results without registration or downloads.
Everything runs locally in your browser, so your data is never uploaded or stored — privacy first.
Frequently Asked Questions
Is this tool free to use? +
Yes, it is completely free with no registration or download required.
Is my data private? +
Yes. Everything is processed locally in your browser. Nothing is uploaded or stored on our servers.
Does it work on mobile? +
Yes, it works on any device — phone, tablet, or desktop.