Average Calculator

Mean, median, and mode

These three "averages" each describe the middle of a set of numbers in a different way. Paste or type your values and this calculator returns all three at once, plus the range, sum, count, and the smallest and largest values. Numbers can be separated by commas, spaces, or new lines.

What each one means

• Mean — the arithmetic average: add every value and divide by how many there are. It's the most common "average," but a few extreme values can pull it off-center.
• Median — the middle value when the numbers are sorted (or the average of the two middle ones). It ignores how far away the extremes are, so it better represents "typical" when the data is skewed.
• Mode — the value that appears most often. A set can have one mode, several, or none if every value is unique.

Mean vs. median — which to use

When data is roughly symmetric, the mean and median are close and either works. When it's skewed by outliers — incomes, house prices, response times — the median is usually the fairer summary. That's why you'll often see "median household income": a handful of very high earners would inflate the mean and overstate what's typical.

FAQ

What is the range?

The difference between the largest and smallest values. It's a quick measure of spread, though it only reflects the two extremes, not how the rest of the values are distributed.

Can it handle decimals and negatives?

Yes — enter any real numbers, including decimals and negatives. Just separate them clearly with commas, spaces, or line breaks.

Is this calculator free to use?

Yes, it's completely free with no sign-up, no limits on how many numbers you enter, and no ads interrupting the result. Calculate as many sets as you like.

Does my data stay private?

Yes. The calculation runs entirely in your browser using JavaScript, so the numbers you paste are never uploaded to a server or stored anywhere. Closing the tab erases everything.

What happens if there's no mode?

When every value appears the same number of times — for example, all values are unique — there is no single most-frequent value, so the calculator reports that no mode exists. If several values tie for most frequent, it lists all of them.

Does it work on my phone?

Yes, the tool is fully responsive and works in any mobile browser. Separating numbers with commas is often easiest on a phone keyboard, but spaces and line breaks work too.