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Combination & Permutation

Calculate C(n,k) and P(n,k)

combinationpermutationC(n,k)P(n,k)

📖 How to Use

  1. Enter the total n
  2. Enter the selection count k
  3. Click Calculate to see both P(n,k) and C(n,k)

📐 Formula

P(n,k) = n!/(n−k)!
C(n,k) = n!/(k!×(n−k)!)

❓ FAQ

What's the difference between permutation and combination?▾
Permutations consider order (like lining up); combinations do not (like choosing people).

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About Combination & Permutation

This tool is completely free, no registration required. Works directly in your browser. Supports both PC and mobile devices.

Combination & Permutation is a free online tool that works on both PC and mobile. No registration or download required — just open in your browser. Results are accurate and reliable for everyday use and professional reference.