Mean Calculator
The Mean Calculator finds the arithmetic mean (average) of a list of numbers, along with the sum and count. Enter your values separated by commas.
Formula
Mean = Sum of values ÷ Count of values
- Add all the numbers, then divide by how many there are.
- The mean is sensitive to outliers — a single extreme value shifts it.
5, 10, 15, 20, 25
Inputs
- Numbers (comma-separated): 5,10,15,20,25
Sum 75 ÷ 5 values = mean of 15.
Frequently asked questions
What is the mean?
The arithmetic mean is the sum of all values divided by how many values there are — the everyday average.