Average Calculator
Calculate the average, sum, minimum and maximum of a list of numbers.
Average: 18
Sum: 108
Count: 6
Min / Max: 4 / 42
About this tool
This calculator finds the average (arithmetic mean) of any list of numbers, along with the sum, count, minimum and maximum — useful for anything from averaging a set of test scores or expenses to summarizing a batch of measurements.
Enter numbers separated by commas, spaces, or line breaks, in any combination — including a column pasted directly from a spreadsheet — and the tool automatically extracts every valid number and calculates the results instantly.
Because the mean can be skewed by outliers (an unusually large or small value), the minimum and maximum are shown alongside the average, giving you a quick sense of the spread of your data, not just its center.
Worked example
- 1Enter your numbers, separated by commas, spaces or line breaks.
- 2The calculator adds them all together to get the sum, and counts how many valid numbers were entered.
- 3The average is the sum divided by the count. Example: 4, 8, 15, 16, 23, 42 → sum 108 ÷ 6 numbers = average 18.
Formula
Average = Sum of numbers / Count of numbers
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Frequently asked questions
- How is the average calculated?
- The average, or arithmetic mean, is the sum of all numbers divided by how many numbers there are. It's the most common way to summarize a set of values with a single representative number.
- How do I enter multiple numbers?
- Separate numbers with commas, spaces, or new lines — you can even paste a column of numbers copied from a spreadsheet. The calculator automatically parses all valid numbers and ignores anything else.
- What's the difference between average, median and mode?
- The average (mean) is the sum divided by the count. The median is the middle value when the numbers are sorted. The mode is the most frequently occurring value. This calculator computes the average, sum, minimum and maximum, not the median or mode.
- Can one extreme value skew the average?
- Yes — the mean is sensitive to outliers. A single very large or very small number can pull the average noticeably away from what most of the values actually look like, which is why the minimum and maximum are also shown for context.