Average Calculator
Get the mean, median, mode, range, sum, and count from any list of numbers you paste in.
Enter at least one number to see the statistics.
How to use the average calculator
Drop your numbers into the box. You can separate them with commas, spaces, tabs, or line breaks, so pasting a column straight from a spreadsheet works just as well as typing them out by hand.
The full summary appears at once: mean, median, and mode up top, with range, sum, count, minimum, and maximum below. Anything that is not a number, like a stray label or an extra comma, is skipped without complaint, so messy input still gives a clean answer.
Mean, median, and mode explained
These three are all measures of the center of a dataset, but they answer slightly different questions. Take the set 2, 4, 4, 4, 5, 5, 7, 9 as a running example.
- Mean is the arithmetic average: add every value and divide by how many there are. Here the sum is 40 over 8 values, so the mean is 5.
- Median is the middle value once the numbers are sorted. With an even count, it is the average of the two middle ones, which is (4 + 5) ÷ 2, or 4.5.
- Mode is the value that appears most often. Four shows up three times, more than any other, so the mode is 4.
When to use each measure
The mean is the everyday average and works well when values cluster together, like a set of exam scores. Its weakness is sensitivity to outliers: one extreme salary can drag the mean of a small team far from what anyone actually earns.
The median sidesteps that problem by reporting the middle, which is why incomes and house prices are usually quoted as medians. The mode is the one to reach for with categories or repeated readings, such as the most common shoe size sold or the rating customers pick most.
Range and the rest of the summary
Range is the distance from the smallest value to the largest, found by subtracting the minimum from the maximum. In the example set that is 9 minus 2, giving a range of 7. It is a quick read on how spread out the numbers are.
Sum and count are the building blocks behind the mean, and seeing them alongside the minimum and maximum gives a fuller picture than any single average. A dataset where the mean and median sit far apart is often hiding a skew worth a second look.
Frequently asked questions
- What is the difference between mean and median?
- The mean adds all values and divides by the count, while the median is the middle value when sorted. The median resists outliers, so it often describes skewed data like income better than the mean.
- Can a dataset have more than one mode?
- Yes. If two or more values tie for the highest frequency, the set is multimodal and the calculator lists each one. If no value repeats, there is no mode and the result shows None.
- How do I find the median of an even number of values?
- Sort the numbers and take the two in the middle, then average them. For eight values, the median is the average of the fourth and fifth, which is why an even set can have a median that is not in the list.
- What separators can I use between numbers?
- Commas, spaces, tabs, semicolons, and line breaks all work, and you can mix them. This lets you paste a row or a column from a spreadsheet without reformatting it first.
- What happens to text or invalid entries?
- Tokens that are not finite numbers are ignored, so a label, a unit, or a double comma will not cause an error. Only the valid numbers are counted in the statistics.