Online Calculators > Math Calculators > Permutation Calculator

Permutation Calculator

Permutation Calculator - calculate permutation which is how many different ways to choose items. Online permutation calculator to find number of ways to select r out of n items.

Total # of Items (n) must be greater or equal to the # of Items Chosen (r).

Online Permutation Calculator

Total # of Items (n):
# of Items Chosen (r):

Permutation Formula

Following is the permutation formula on how to calculate permutation.
P(n,r) = n!/(n−r)!, where
n! = n*(n-1)!

For example, to calculate P(5,3), we would plugin the numbers to the permutation formula
5!/(5-3)! = (5*4*3*2*1)/(2!) = (120)/2*1 = 60

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