Permutations Calculator
Ordered arrangements of r of n.
Enter the values and press Calculate.
How to use Permutations Calculator
Permutations count ordered arrangements: picking r items from n where sequence matters. This tool computes n permute r exactly.
Open Permutations Calculator on toolpermarket. It runs entirely in your browser, so you can start without creating an account.
Enter the total n and the number r to arrange in the fields above, then press Calculate.
Read the result below the form. Change any input and run it again as many times as you like — the math is instant and local.
Worked example. Arranging 2 items from 5 gives 20 possible ordered permutations.
When to use Permutations Calculator. Use it for rankings, codes, or any problem where order changes the outcome.
Frequently asked questions
Is Permutations Calculator free to use?
Yes. Permutations Calculator runs entirely in your browser. There is no account, no upload, and no cost.
Does Permutations Calculator work on mobile?
Yes. The layout is responsive, so Permutations Calculator works on any phone, tablet, or desktop with a modern browser.
Why are permutations larger than combinations?
Because each group of r items can be ordered in r factorial ways, and permutations counts every ordering separately.
What if r equals n?
Then it is the full arrangement of all items, which equals n factorial.