Combinations & Permutations
Compute combinations (nCr) and permutations (nPr) for any non-negative integers n ≥ r.
Permutations vs combinations
nPr = n! / (n−r)! counts ordered arrangements; nCr = n! / (r! · (n−r)!) counts unordered selections.
Frequently Asked Questions
Is the Combinations & Permutations free to use?
Yes, the Combinations & Permutations is 100% free to use. There are no subscriptions, no sign-ups, and no hidden fees.
Is my data safe when using the Combinations & Permutations?
Absolutely. All calculations performed by the Combinations & Permutations happen locally in your web browser. We do not store, track, or transmit your inputs or results to any server.
How accurate is the Combinations & Permutations?
Our Combinations & Permutations uses industry-standard formulas and methodology. You can view the exact formula and calculation logic used in the methodology section above to verify the math yourself.
Can I use the Combinations & Permutations on my mobile phone?
Yes! The Combinations & Permutations is fully responsive and works seamlessly on all devices including smartphones, tablets, and desktop computers.