FREE ONLINE CALCULATOR / MATH & NUMBERS
Permutation Calculator
Count ordered arrangements of r objects chosen from n. Fast, private, and built to make every number easier.
Input values
✦ InteractiveHow does this calculator work?
Count ordered arrangements of r objects chosen from n. Edit the inputs and see the computed results. All calculations take place inside your browser, without submitting values to a server.
P(n,r) = n!/(n−r)!
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