How to use: Permutation Calculator
Permutation Calculator is a free online Math & Statistics tool that p(n,r) ordered arrangements computed exactly with BigInt — no floating point rounding instantly in your browser. Paste your data, adjust the options and get the result in real time — no installation, no sign-up, and nothing is ever uploaded to a server.
Use Permutation Calculator now →
Description
P(n,r) ordered arrangements computed exactly with BigInt — no floating point rounding.
- Math & Statistics
- Because everything is computed client-side, Permutation Calculator is safe to use with sensitive data such as API keys, tokens or private logs.
How to use
Using Permutation Calculator takes three steps:
- Paste your data into the input box (or load the example).
- Configure the options to match your target format or scenario.
- Copy, download or inspect the output — it updates live as you type.
Run
Examples
P(10,3) — ordered selections without repetition.
Input
10, 3
Output
P(10,3) = 720 Digits: 3 Formula: n! / (n-r)!
This output was produced by actually running the tool, not written by hand.
Use cases
Common situations where Permutation Calculator helps:
- P(n,r) ordered arrangements computed exactly with BigInt — no floating point rounding.
Parameters
| key | Options | type | allowed | default | Permutation Calculator |
|---|---|---|---|---|---|
n | n | number | — | 10 | 10 |
r | r | number | — | 3 | 3 |
mode | Operation | select | ncr (C(n,r) — combinations), npr (P(n,r) — permutations), fact (n! — factorial), pow (n^r — power), mult (multinomial / repetition C(n+r-1,r)) | — | npr |
Input: not required — the tool generates its own data · Output: text · live update while typing: ✓
FAQ
What is Permutation Calculator?
Permutation Calculator p(n,r) ordered arrangements computed exactly with BigInt — no floating point rounding. It runs entirely in your browser, so your data stays private.
Is Permutation Calculator free to use?
Yes. Permutation Calculator is free, unlimited and works without registration or installation.
Does my data get uploaded?
No. All processing happens locally in your browser; nothing is sent to any server.
Good to know
- Everything runs client-side, so extremely large inputs are limited by your browser tab’s memory rather than by a server upload limit.