Average Calculator
Enter your numbers to find their average, with the sum, count, smallest and largest. In everyday use, the average is the mean: add the numbers, then divide by how many there are.
Example loaded: 85, 90, 78, 92, 88. Select Clear to enter your own numbers.
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Average: the quick answer
The average of a set of numbers is their sum divided by how many numbers there are. It is also called the mean.
Example: for the test scores 85, 90, 78, 92 and 88 the sum is 433 and there are 5 scores, so the average is 433 / 5 = 86.6.
How to find the average
- Count how many numbers you have.
- Add them all up to get the sum.
- Divide the sum by the count: average = sum / count.
When the average can mislead
A few very large or very small numbers can drag the average away from what is typical. Income is the classic case: a few very high earners lift the average above what most people earn. In those cases the median calculator is a better guide. Both answers are on the mean, median, mode calculator.
If some numbers count more than others, such as an exam worth more than a quiz, a plain average is not right. You need a weighted average: multiply each score by its weight, add them, and divide by the total of the weights.
Frequently asked questions
What is the average of a set of numbers?
It is the sum of the numbers divided by how many there are. It is also called the mean.
Is average the same as mean?
Usually yes. Statisticians prefer the exact words mean, median and mode, because average can mean any of them. See the mean calculator for more on the mean.
How do I find the average in Excel or Google Sheets?
Type =AVERAGE(A1:A10), changing the range to match your cells. Text and empty cells are ignored.
How do I find the average of two numbers?
Add them and divide by 2. The average of 8 and 14 is 22 / 2 = 11.
How do I average percentages?
If every percentage is out of the same amount, average them like any numbers. If the groups differ in size, weight each percentage by its group size.
Why is the average higher than the median?
A few large values are pulling the average up. The data is skewed to the high side.
About this calculator
Written by Umar Khan. The calculator adds your numbers and divides by the count. Here, average means the arithmetic mean. Results are shown to up to 10 decimal places (6 for standard deviation) with trailing zeros dropped, and your numbers stay in your browser. Last updated November 9, 2026. Questions or corrections: [email protected].
Written by Umar Khan
Umar Khan is a PhD student in engineering at NTNU, the Norwegian University of Science and Technology, in Norway. Every formula and worked example on this page is shown in full so you can check each result yourself. Corrections are welcome at [email protected].
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For information only, not professional advice.
Written by Umar Khan. Last updated: November 9, 2026.