4 Permute 4 — What is 4P4?
4P4 equals 24, which is 4! — the total number of ways to arrange all 4 items in order.
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 npr and the full breakdown beneath it.
When r equals n, 4P4 gives you the factorial of 4, representing every possible ordering of all four items.
Frequently asked questions
- What is a permutation?
- A permutation is an ordered arrangement. nPr = n!/(n-r)!. For example, P(5,2) = 5×4 = 20 ordered pairs from 5 items.