Average Calculator
Paste any list of numbers and instantly get the average (mean), sum, count, minimum, maximum and range.
How to calculate average
The average — also called the arithmetic mean — tells you the typical or central value of a set of numbers. To calculate the average, you only need two steps: add up all the numbers to get the sum, then divide that sum by how many numbers there are (the count). The formula is simply Average = Sum ÷ Count.
Worked example
Suppose you scored 72, 85, 90, 68 and 95 in five tests and want your average score.
72 + 85 + 90 + 68 + 95 = 410. This is the total of all five values.
There are 5 test scores in the list, so the count is 5.
410 ÷ 5 = 82. Your average test score is 82.
Other statistics this tool gives you
Beyond the mean, the calculator also reports a few useful summary statistics about your list of numbers.
The total you get when every number is added together.
How many numbers are in your list — also called the sample size.
The smallest and largest values found in your list.
The spread of the data: Maximum − Minimum. A larger range means more variation.
Frequently asked questions
How do I calculate the average of a list of numbers?
Add all the numbers together to get the sum, then divide that sum by how many numbers you have. For example, the average of 4, 8 and 12 is (4 + 8 + 12) ÷ 3 = 24 ÷ 3 = 8. This tool does both steps automatically as you type.
What is the difference between average, mean and median?
In everyday use, "average" and "mean" refer to the same thing — the arithmetic mean (sum ÷ count). The median is different: it is the middle value when the numbers are sorted in order. The mean can be pulled up or down by very large or very small values, while the median is less affected by outliers.
How do I separate the numbers I enter?
You can separate your numbers with commas, spaces, or new lines — or any mix of the three. For example, "10, 20 30" and "10 20 30" and one number per line all work the same way. Decimal points and negative numbers are supported.
Can I calculate the average of decimals or negative numbers?
Yes. The calculator handles decimals (like 3.5 or 0.25) and negative numbers (like -10) without any problem. Just type them into the box separated by commas or spaces.
Is my data sent anywhere?
No. All calculations run entirely in your browser using JavaScript. Your numbers are never uploaded to a server, so the tool is private and works even when you go offline after loading the page.