Permutations & Combinations Calculator

Calculate permutations (nPr) and combinations (nCr) with step-by-step factorial breakdowns.

Total Items (n)

Selected Items (r)

Combinations nCr (Order does NOT matter)

Formula: n! / (r!(n-r)!)

Permutations nPr (Order DOES matter)

Formula: n! / (n-r)!

How to Use

Enter the total items and selected items.
Select nPr & nCr to view the combinations ncr (order does not matter) and permutations npr (order does matter).