Not sure which calculator to use? Here's a side-by-side comparison of the Combination Calculator and Permutation Calculator to help you pick the right one for your needs.
Calculate combinations nCr (unordered selections) using the formula n!/(r!(n-r)!). Find the number of ways to choose r items from n items.
Calculate permutations nPr (ordered arrangements) using the formula n!/(n-r)!. Find the number of ways to arrange r items from n items.
| Feature | Combination Calculator | Permutation Calculator |
|---|---|---|
| Category | Math & Science | Math & Science |
| Inputs | 2 required fields | 2 required fields |
| Outputs | 3 results | 3 results |
| Chart | No chart | No chart |
| FAQs | 3 answered | 3 answered |
Choose the Combination Calculator if you need to calculate combinations (ncr). Use the Permutation Calculator if you need to calculate permutations (npr). Both calculators are free and require no sign-up.
