Permutation Calculator
Calculates the number of ordered arrangements (nPr).
Lilu Baba's Permutation Calculator computes nPr — the number of ways to arrange r items from a set of n, where order matters.
How to use this calculator
- Enter the total number of items (n).
- Enter how many are chosen and arranged (r).
- nPr updates instantly.
nPr
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FAQ
Permutation Calculator — frequently asked questions
nPr = n! ÷ (n − r)!.
Permutation counts arrangements where order matters; combination counts selections where order does not matter.