What the tool does, how to run it, and what to expect from the result.
Combinations count selections where order does not matter: C(n, r) = n! ÷ (r! (n − r)!). Choosing 3 of 10 gives 120. Permutations count ordered arrangements: P(n, r) = n! ÷ (n − r)! = 720. The calculator uses exact integer arithmetic, so big results like C(52, 5) = 2,598,960 are not rounded.
A quick way to understand who this helps, what it solves, and where it connects next.
Students, teachers and anyone checking a calculation.
Using the combination calculator without installing anything or signing up.
Short answers for the questions people usually have before trying a utility like this.
Combinations for groups (a committee, a lottery ticket), permutations for orderings (a race podium, a PIN).
One in C(49, 6) = 13,983,816.
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Enter your numbers and the result updates live in your browser. Nothing is uploaded and no server is used.
Calculations run locally in your browser; nothing is uploaded.