Example: n (total items): 10 · r (chosen): 3 → Combinations nCr: 120.
Permutations nPr: 720
Frequently asked questions
How do I calculate permutation & combination? Enter your numbers above and the result updates instantly. For example: n (total items): 10 · r (chosen): 3 → Combinations nCr: 120.
Is this Permutation & Combination Calculator free? Yes — completely free with no sign-up or paywall. It runs entirely in your browser and keeps working offline; the numbers you enter never leave your device.
How accurate is it? It uses the standard published formula for permutation & combination. Results are estimates for planning — not financial, tax, medical, engineering, or legal advice.