8 Choose 4 — What is 8C4?
8C4 equals 70, meaning 70 unique groups of 4 can be formed from 8 distinct items.
How to use this tool
- Enter n (total items) and r (items chosen) in the fields above.
- Results update instantly as you type — or click Calculate.
- Read your ncr and the full breakdown beneath it.
Use this calculator to find 8C4 and determine every possible unordered selection of 4 items from 8.
Frequently asked questions
- What is a combination?
- A combination is an unordered selection. nCr = n!/(r!(n-r)!). For example, C(5,2) = 10 — choosing 2 from 5 ignoring order.