Permutation & Combination Calculator

Calculate nPr and nCr values instantly.

Permutations nPr
—
Order matters
Combinations nCr
—
Order doesn't matter

About This Tool

The Permutation & Combination Calculator computes nPr (permutations) and nCr (combinations) for any values of n and r.

How To Use

  1. Enter n (total items) and r (items chosen).
  2. Click Calculate to see both nPr and nCr values.

Features

  • Computes both nPr and nCr simultaneously
  • Handles large factorials accurately
  • Shows formula used
  • Useful for statistics and probability

Frequently Asked Questions

What is the difference between permutation and combination?
In permutations (nPr), order matters — arranging 3 letters from 5 gives different results for each order. In combinations (nCr), order does not matter — choosing 3 from 5 is the same group regardless of order.
What is the formula for nPr?
nPr = n! / (n-r)!
What is the formula for nCr?
nCr = n! / (r! × (n-r)!)

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