Permutation calculator
Enter n and r.
Result
P(5, 2) = 20.
Example
Count ordered arrangements of items taken r at a time.
P(5, 2) = 20.
Processed locally in your browser.
Methodology
P(n, r) = n! / (n − r)!, where order matters.
Related tools
Enter n and r.
P(5, 2) = 20.
Count ordered arrangements of items taken r at a time.
P(5, 2) = 20.
Processed locally in your browser.
P(n, r) = n! / (n − r)!, where order matters.