Permutations Calculator
A free, browser-based calculator. Runs entirely in your browser — no sign up, nothing stored.
100% FreeRuns in your browserBasic
Enter Values
Enter your values and press Calculate to see results.
How to use this calculator
- Enter the total items (n) and chosen (r).
- Press Calculate.
How it works
Permutations (nPr) count ordered arrangements: n! ÷ (n − r)!.
Worked example
5P2. = 20.
Related tools
Tip: Enter any known values to calculate the remaining results.
All calculations run in your browser. Your inputs are never saved or transmitted.