Math & Statistics Tools
Permutations & Combinations Calculator
Calculate nPr (permutations), nCr (combinations), with factorial breakdown.
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What is P & C?
Permutations count ordered selections: nPr = n!/(n-r)!. Combinations count unordered groups: nCr = n!/(r!(n-r)!).
How it works
We compute using the formulas, handling large values with BigInt and providing both exact and approximate (scientific notation) outputs.
- Enter your input. Type or paste your input into the field above — the tool responds instantly.
- Review the result. Output updates live as you type. Everything runs entirely in your browser.
- Copy or download. Use the Copy button to grab the result, or Download to save it as a file.
Examples
Realistic sample
Type or paste any realistic input — the tool computes the result locally and instantly.
Common mistakes
Expecting a server round-trip
Nothing is uploaded — every tool in this category runs entirely in your browser.