Math Calculators

Permutation Calculator – nPr Calculator

Calculate permutations (nPr). Find the number of ways to arrange r items from n items where order matters.

Total Items (n)

Items to Arrange (r)

Permutation Calculator Formula

nPr = n! / (n−r)!

Permutations count arrangements where order matters.

5P3 = 5! / (5−3)! = 120 / 2 = 60

There are 60 ways to arrange 3 items from 5.

When do I use permutations vs combinations?

Calculate combinations (nCr). Find ways to choose r items from n items where order does not matter.

Calculate the probability of events. Find single event probability and combined event probabilities.

Calculate percentages easily. Find what percent one number is of another, or calculate the percentage of a number.