Permutation & Combination

nPr and nCr — count ordered arrangements and unordered selections.

Total items (n)

Chosen (r)

Combinations (nCr)

120

order doesn't matter

Permutations (nPr)

720

GKCalculators — Free AI Calculators

Advanced, AI-powered online calculators with detailed results, charts and plain-English explanations. 300+ free tools, no sign-up required.

GKCalculators home — free online calculators with detailed results and AI insights.