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).
Permutation Formula
Following is the permutation formula on how to calculate permutation.
P(n,r) = n!/(n−r)!, where
n! = n*(n1)!
For example, to calculate P(5,3), we would plugin the numbers to the permutation formula
5!/(53)! = (5*4*3*2*1)/(2!) = (120)/2*1 = 60
1 permutation 0
2 permutation 1
3 permutation 2
4 permutation 2
4 permutation 3
5 permutation 2
5 permutation 3
6 permutation 2
6 permutation 4
7 permutation 2
8 permutation 2
8 permutation 4
9 permutation 2
10 permutation 2
12 permutation 2
