Average Calculator – Calculate Mean, Median & More
Calculate the mean (average), median, and other statistics for any set of numbers. Enter values separated by commas or spaces for instant results.
Separate numbers with commas or spaces
"Average" usually means the mean – add up all values and divide by how many there are. But there are other averages too. The median is the middle value when sorted. The mode is the most common value. Each tells you something different about your data.
The mean is sensitive to outliers. One extremely high or low value can skew it significantly. The median ignores outliers – it only cares about the middle. That's why median household income is more meaningful than mean income for understanding typical earnings.
Example: Salaries at a Small Company
Employees earn: $40k, $42k, $45k, $48k, $50k, $52k, $200k (CEO)
Mean: $68,143 | Median: $48,000
The mean suggests a typical salary of $68k, but 6 of 7 employees earn less than $55k. The median ($48k) better represents what a typical employee earns.
| Measure | What It Is | When to Use |
|---|---|---|
| Mean | Sum of all values ÷ count | Normally distributed data, no extreme outliers |
| Median | Middle value when sorted | Skewed data, data with outliers (income, home prices) |
| Mode | Most frequently occurring value | Categorical data, finding most common option |
| Range | Maximum - Minimum | Quick sense of data spread |
| Sum | Total of all values | Aggregating quantities (total sales, total scores) |
| Count | Number of values | Sample size, data completeness checks |
Add up all the numbers
This gives you the sum. For 5, 10, 15, 20, 25: sum = 75.
Count how many numbers there are
In our example: 5 numbers.
Divide the sum by the count
Mean = 75 ÷ 5 = 15. That's your average.