Mean Calculator
Also known as the average: add all values and divide by how many there are.
Calculator
Use the Mean Calculator
Result
—
Formula
μ = Σx ÷ n
Step-by-step
- 1
Enter values
List your numbers, separated by commas.
- 2
Read the mean
The balance point of the data.
Worked example
Example input: numbers: 2,4,6
Result: 4
Related tools
- Median Calculator
Middle of sorted data.
- Standard Deviation
Spread of the data.
Frequently asked questions
How is the mean calculated?
Add all the values together and divide by how many there are. For 2, 4, 6: (2 + 4 + 6) ÷ 3 = 4.
When should I use the mean instead of the median?
Use the mean when values are fairly evenly spread, because it uses every number. Use the median when a few extreme values could distort the picture, such as house prices or salaries.
Can I enter negative or decimal numbers?
Yes. Enter them separated by commas, for example: 1.5, -2, 3.25, 0.
What do I need to run this calculator?
At least one number. An empty list has no mean, so the calculator asks for comma-separated values before computing. Two numbers is the smallest meaningful dataset.
How do you find the mean of a data set?
Add every value in the data set, then divide the total by how many values there are. For example, the data set 5, 7, 9, 11 adds to 32, and 32 ÷ 4 gives a mean of 8. This calculator runs those two steps for any comma-separated list.
What is the mean of 10, 20 and 30?
20. The sum is 10 + 20 + 30 = 60, and 60 ÷ 3 = 20, so the mean of 10, 20, 30 is exactly 20 — it sits halfway between the smallest and largest value.