Permutation Calculator
Calculate the number of ordered arrangements (permutations) of r items from n.
About this calculator
The Permutation Calculator on NumberCals is a free, mobile-friendly tool for anyone needing to calculate the number of ordered arrangements (permutations) of r items from n. Enter your values in the form below and the result is computed instantly — no sign-up, no installation, no waiting.
Formula used
nPr = n! / (n − r)!
What you'll need
- n (total items) (e.g. 10)
- r (items chosen) (e.g. 3)
What you'll get
- Permutations (nPr)
Formula
nPr = n! / (n − r)!
Result
Frequently Asked Questions
Permutation vs combination? +
Permutations count order (ABC ≠ BCA); combinations don't (ABC = BCA).
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