Permutation and Combination Calculator
Order matters? nPr. It doesn't? nCr. Both computed exactly even for big n.
Combinations nCr
120
- Permutations nPr
- 720
- With repetition
- 1000 (nʳ) and 220 (multiset)
How the Permutation and Combination Calculator works
The calculation follows the standard method used across the US — no shortcuts, no hidden assumptions. Here is exactly what happens behind the scenes:
Formula
nPr = n!/(n−r)! ; nCr = n!/(r!(n−r)!)
Frequently Asked Questions
How does the Permutation and Combination Calculator work?
Enter your numbers above and results update instantly using standard formulas, computed entirely on your device.
Is the Permutation and Combination Calculator free to use?
Yes — completely free with no signup required, and it works on phones, tablets, and desktops.
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