Permutation Calculator
Permutation Calculator
Permutation Calculator
Calculate P(n,r) — number of ways to arrange r items from n items
Calculate number of ways to arrange r items from n items where order matters. Essential for combinatorics and probability.
Key Features
Permutation calculation
Large number handling
Formula display
Clear explanations
Instant computation
Multiple values support
How to Use This Tool
Enter total items (n)
Enter total items (n)
Enter items to arrange (r)
Enter items to arrange (r)
Click Calculate Permutations
Click Calculate Permutations
View number of arrangements
View number of arrangements
Check formula used
Check formula used
Use Cases
Arranging people/items
Counting possibilities
Permutation problems
Scheduling tasks
Combinatorics homework
Frequently Asked Questions
What is permutation?
Order matters arrangement
Formula?
P(n,r) = n!/(n-r)!
Can r be 0?
Yes, 1 way
Can r > n?
No, impossible
Tool Information
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