Permutation and Combination Calculator

Calculate permutations and combinations.

n (total items)

r (items to choose)

Results

Permutation (nPr):

Combination (nCr):

What is this Permutation and Combination Calculator for?

Calculates ways to arrange or select items.

Permutation (order matters): n!/(n-r)!. Combination: n!/[r!(n-r)!].