How Does This Calculator Work?
The average (arithmetic mean) is the sum of all values divided by how many values there are.
Enter up to four numbers to find their average — useful for quick sets of grades, prices, or measurements. Enter 0 for any unused slots.
Example Calculation
Three Test Scores Example
Scores of 10, 20, and 30 (4th slot left at 0 — see note above).
(10+20+30+0)/4 = 15.
Tips
If you have fewer than 4 numbers, enter 0 for the remaining slots — but note this will pull your average toward zero, so for very small data sets, calculating by hand may be more accurate.