How to use: Combination Calculator
Combination Calculator is a free online Math & Statistics tool that c(n,r) with exact BigInt arithmetic and a list of the actual combinations for small inputs 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 Combination Calculator now →
Description
C(n,r) with exact BigInt arithmetic and a list of the actual combinations for small inputs.
- Math & Statistics
- Because everything is computed client-side, Combination Calculator is safe to use with sensitive data such as API keys, tokens or private logs.
How to use
Using Combination 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
C(52,5) — the number of five-card poker hands. Small inputs also list the actual combinations.
Input
52, 5
Output
C(10,3) = 120
Digits: 3
Formula: n! / (r! (n-r)!) = 10! / (3! 7!)
First 40 of 120 combinations of {1…10}:
123 124 125 126 127 128 129 1210 134 135 136 137 138 139 1310 145 146 147 148 149 1410 156 157 158 159 1510 167 168 169 1610 178 179 1710 189 1810 1910 234 235 236 237 238
This output was produced by actually running the tool, not written by hand.
Use cases
Common situations where Combination Calculator helps:
- C(n,r) with exact BigInt arithmetic and a list of the actual combinations for small inputs.
Parameters
| key | Options | type | allowed | default | Combination 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)) | — | ncr |
Input: not required — the tool generates its own data · Output: text · live update while typing: ✓
FAQ
What is Combination Calculator?
Combination Calculator c(n,r) with exact BigInt arithmetic and a list of the actual combinations for small inputs. It runs entirely in your browser, so your data stays private.
Is Combination Calculator free to use?
Yes. Combination 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.