What does the Permutation and Combination Calculator work out?

Ways to arrange or choose from a set. It is one of the Math tools on Mondo Knows.

How is the Permutation and Combination Calculator calculated?

The maths is short enough to check by hand: nPr = n!/(n-r)! and nCr = n!/(r!(n-r)!).

Do I need to sign up, and is my data stored?

No sign-up, and nothing you type is sent anywhere. The calculation runs in your own browser, so the figures stay on your device and the page works offline once loaded.

Mondo Knows Tools

Permutation and Combination Calculator

Ways to arrange or choose from a set. Use the free permutation and combination calculator below to get an instant answer, with the formula shown so you can check the maths and trust the result. Free, private, and no sign-up.

Total items (n)

Chosen (r)

Mondo says

Combinations (nCr)

120

Permutations (nPr)720

10!3,628,800

The formula

nPr = n!/(n-r)! and nCr = n!/(r!(n-r)!)

Permutation and Combination Calculator: common questions

What does the Permutation and Combination Calculator work out?: Ways to arrange or choose from a set. It is one of the Math tools on Mondo Knows.
How is the Permutation and Combination Calculator calculated?: The maths is short enough to check by hand: nPr = n!/(n-r)! and nCr = n!/(r!(n-r)!).
Do I need to sign up, and is my data stored?: No sign-up, and nothing you type is sent anywhere. The calculation runs in your own browser, so the figures stay on your device and the page works offline once loaded.

Mondo also knows

Probability CalculatorTwo independent events, together or either.➗ Math Factor CalculatorAll divisors of a number and its prime factors.➗ Math Prime Number CheckerTest a number, factor it, or list the primes in a range.➗ Math Pythagorean Theorem CalculatorSolve a right triangle's missing side.➗ Math

Estimates for general guidance only. This is not financial, medical or legal advice. Everything runs in your browser and nothing you type is stored.