Permutation Calculator
Compute nPr = n! ÷ (n − r)!: how many ordered arrangements of r items from n.
Calculator
Permutation Calculator
Result
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Formula
nPr = n! ÷ (n − r)!
Step-by-step
- 1
Enter n and r
n is the pool size, r is how many you pick.
- 2
Read the count
Ordered arrangements are shown.
Worked example
Example input: n: 10, r: 3
Result: 720
Related tools
- Combination Calculator
Same but order does not matter.
- Factorial Calculator
n! for any n.