Average Calculator
Mean, median, mode and range of any set of numbers or test scores.
Enter at least two numbers, separated by commas or spaces. For example: 80, 90, 100 or 1 2 2 3.
Everything is calculated in your browser — nothing you enter is sent anywhere. The mean is the ordinary average; the median is the middle value when the numbers are sorted. If your numbers are test scores, the grade percentage calculator converts a single score to a percentage and letter grade.
Mean, median, mode and range — what each one tells you
| Measure | Definition | Example (80, 90, 100) |
|---|---|---|
| Mean | Add all values, divide by how many there are | (80 + 90 + 100) ÷ 3 = 90 |
| Median | Middle value of the sorted list (or the average of the two middle values) | 90 |
| Mode | The value that appears most often; none if no value repeats | No mode |
| Range | Highest value minus lowest value | 100 − 80 = 20 |
Average calculator — mean, median, mode and range
An average calculator takes a list of numbers and returns the mean, median, mode, range, count, sum, and the sorted list. Paste in your test scores, measurements, or any set of values, and you get the full picture — not just one average, but the measures that show how the numbers are spread out.
The mean is the familiar average: add everything up and divide by how many numbers there are. The median is the middle value once the list is sorted, which is useful when one very high or very low value would pull the mean away from the typical value. The mode is the value that appears most often — there can be more than one, and there is no mode at all if no value repeats. The range (highest minus lowest) shows the spread at a glance.
For a deeper look at spread, the standard deviation calculator measures how far values typically sit from the mean. For a single test score as a percentage, use the percentage calculator.
How the average calculator works
Mean, median, mode and range — four different "averages". The mean is the sum divided by how many numbers there are. The median is the middle value when the numbers are sorted (or the average of the two middle values). The mode is the most frequent value. The range is the highest minus the lowest.
For test scores, the mean is what most people want — but if one very low score drags it down, the median tells you the typical score better. The calculator shows all four so you can pick the one that fits.
Working with spread as well as centre? Use the standard deviation calculator.
How to use the average calculator
- Enter your numbers in the box, separated by commas or spaces — for example, 80, 90, 100.
- Enter at least two numbers; a single number has no meaningful average or range.
- Press Calculate average to see the mean, median, mode, range, count, and sum.
- Check the sorted list underneath to see your numbers in order and spot any typos.
Frequently asked questions
What is the average of 80, 90 and 100?
90. The mean is (80 + 90 + 100) ÷ 3 = 270 ÷ 3 = 90, and the median is also 90, the middle value of the sorted list.
How do you find the median of an even number of values?
Sort the list and take the average of the two middle values. For 1, 2, 3, 4 the middle values are 2 and 3, so the median is (2 + 3) ÷ 2 = 2.5.
What is the mode of 1, 2, 2, 3?
2, because it appears twice while every other value appears once. If two values tie for the most appearances, both are modes; if no value repeats, there is no mode.
What is the range of 5, 10, 15?
10. The range is the highest value minus the lowest: 15 − 5 = 10. It is the simplest measure of how spread out a set of numbers is.
What is the difference between mean and median?
The mean adds all values and divides by the count; the median is the middle value of the sorted list. They are equal for symmetric data, but an extreme outlier pulls the mean while the median barely moves — so the median is often the better "typical value" for skewed data like incomes.
Can the average calculator handle decimals and negative numbers?
Yes. Enter decimals like 2.5 or negative numbers like −4 the same way, separated by commas or spaces. The calculator sorts them and computes every measure the same way.
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