Calculating Mean: Average Formula and Examples
Learn how to calculate the mean, when it differs from median or mode, and how to use it for grades, data, and everyday numbers.
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Searching calculating mean means you want the arithmetic average of a set of numbers.
Mean Formula
Mean = Sum of values / Number of values
Example
For the numbers 4, 7, 9, and 10:
Sum = 4 + 7 + 9 + 10 = 30
Count = 4
Mean = 30 / 4 = 7.5
Mean vs Median vs Mode
- Mean: arithmetic average
- Median: middle value when sorted
- Mode: most frequent value
The mean is useful, but outliers can pull it up or down.
The Bottom Line
To calculate the mean, add all values and divide by how many values there are. Use the Average Calculator for quick results.
How to Calculate: Step-by-Step Guide
1
Add the values
Find the total of all numbers in the set.
2
Count how many values there are
Use the number of items in the dataset.
3
Divide total by count
That result is the mean.
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