Permutations & Combinations Calculator
Calculate permutations and combinations instantly. Enter n and r to compare ordered selections (nPr) and unordered selections (nCr). Free, no sign-up.
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How to Use
1
Enter total items
Type the total number of available items as n.
2
Enter chosen items
Type how many items you want to select as r.
3
Compare nPr and nCr
Use nPr when order matters and nCr when order does not matter.
Features
Permutation Result
Calculates nPr for ordered arrangements.
Combination Result
Calculates nCr for unordered selections.
Plain Explanation
Shows when to use permutations versus combinations.
Copy Results
Copy any result for assignments, notes, or planning.
Frequently Asked Questions
Calculator guides
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