Math
Combinations & Permutations
How many ways to choose r items from n? With or without order — here.
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What does Combinations & Permutations?
Calculate combinations and permutations for any given n and r values.
How to use Combinations & Permutations?
- Enter the total number of items (n).
- Enter the number of items to choose (r).
- View the combinations C(n,r) and permutations P(n,r) results.
Key features
- Calculates both combinations (order does not matter) and permutations (order matters).
- Shows the formula used for each calculation.
- Handles large values with precise results.
Frequently asked questions
What is the difference between combinations and permutations?
Combinations count selections where order does not matter; permutations count arrangements where order matters.
When would I use combinations vs permutations?
Use combinations for selecting a team; use permutations for arranging people in a line or assigning roles.
Is this tool free?
Yes, this tool is completely free and requires no registration.
Is my data saved?
No. All calculations happen in your browser only — no data is sent to any server.