How to use the Average Calculator
Enter the numbers separated by commas or new lines and the result appears straight away. Everything runs in your browser, so nothing you type is uploaded.
Simple average or weighted average
A simple average treats every number the same: add them up and divide the sum by how many there are. A weighted average gives some numbers more importance, such as a final exam that counts for half your course. For weighted grades, multiply each value by its weight first, or use the weighted average score calculator.
Mean, median and other measures
The average, or mean, is the most common measure of central tendency, but it is pulled up or down by unusual values. In the set of numbers 3, 4, 5 and 40, the mean is 13, even though most values are much lower. If you want a figure that ignores outliers, find the average of the middle values with the median instead.
The formula
Mean = sum of values ÷ number of values.
Examples
- 10, 20, 30, 40
Count: 4 Sum: 100 Average: 25 Minimum: 10
- Test scores 88, 92, 79, 95, 84
Count: 5 Sum: 438 Average: 87.6 Minimum: 79
- Weekly sales 1250, 980, 1410, 1100
Count: 4 Sum: 4,740 Average: 1,185 Minimum: 980
Limitations and assumptions
Results are estimates for general information. Check assumptions and inputs before relying on them.
Frequently asked questions
How do I calculate an average?
Add all the numbers and divide by how many there are.
What is the difference between mean, median and mode?
The mean is the arithmetic average, the median is the middle value once sorted and the mode is the most frequent value. Outliers pull the mean but barely move the median.
Can I average percentages?
You can, but a plain average treats each percentage equally. If the groups differ in size, use a weighted average.
Are blank entries counted?
No. Only valid numbers are included.