Calculate permutations (order matters) and combinations (order does not matter). Useful for probability, lottery, and team selection problems.
How it works
- Enter total items (n) and how many you are choosing (r).
- The calculator shows both permutations and combinations.
- Use the result for probability or counting problems.
Frequently asked questions
Permutation vs combination?
Permutations care about order (ABC ≠ BAC). Combinations do not (ABC = BAC).
What if r > n?
The result is zero — you cannot choose more items than exist.
Where is this used?
Lottery odds, team selection, password possibilities, and statistics.