4P4 — Permutations of 4 Things Taken 4 at a Time
4P4 equals 24 — there are 24 ways to arrange all 4 items (4 factorial).
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.
4P4 is 4! = 24, the total number of ways to arrange 4 distinct 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.