Average (Mean)
Work out the mean, median, sum and range from a set of numbers.
Separate numbers with a comma, space or new line.
Mean13
Median13.5
Sum78
Count6
Min … Max7 … 20
Range13
How it works
The word "average" hides several different measures, and using the wrong one can mislead. This calculator gives the mean, the median, the range and more from a list of numbers.
The mean is the sum divided by how many values there are; the median is the middle value once they are sorted. For 4, 8, 15, 16, 23 the mean is 13.2 but the median is 15 — and when one value is extreme, the median often describes the data better.
Enter values separated by commas or spaces and you also get the minimum, maximum, sum and count, which is handy for grades, expenses, measurements or survey data.
Frequently asked questions
What is the difference between mean and median?
The mean is the arithmetic average; the median is the middle value. When a few very large or very small numbers pull the mean away from the centre, the median gives a fairer picture.
How should I separate the numbers?
Use commas or spaces — both work. Decimals and negative numbers are fine, so 3.5, -2, 10 is a valid list.
Do outliers matter?
Yes, the mean is more affected by extreme values than the median.