Average Calculator
Calculate the average (mean) of any list of numbers.
How to use the Average Calculator
- Type or paste your numbers, separated by commas or spaces.
- The average, sum and count update instantly.
Average = sum of all numbers ÷ how many numbers
About the Average Calculator
This calculator finds the arithmetic mean of a list — the sum divided by how many numbers there are — and also reports the sum, the count, the minimum and the maximum. Type or paste values separated by commas, spaces, semicolons or new lines and it parses them all, ignoring anything that is not a number.
The mean is the default summary for good reason: it uses every value and it is the number that balances the list, like a see-saw pivot. But that same property is its weakness. The mean is dragged by outliers. Nine people earning 30,000 and one earning 1,000,000 have a mean income of 127,000 — a figure nobody in the room earns. When a list is skewed, the median (the middle value once sorted) describes the typical case far better, which is why incomes and house prices are almost always reported as medians and why a mean quoted without context should make you suspicious.
The minimum and maximum shown here are a quick sanity check for exactly that: if they sit far apart, the mean is probably hiding something and is worth a second look. To measure that spread properly rather than eyeballing it, use the standard deviation calculator. To express one value as a share of the total, see the percentage calculator.
Frequently asked questions
What is the difference between mean, median and mode?
The mean is the sum divided by the count. The median is the middle value when the list is sorted. The mode is the most frequent value. This tool calculates the mean, along with the sum, count, minimum and maximum.
When is the median better than the mean?
Whenever the data is skewed or has outliers — incomes, house prices, response times. One extreme value can shift a mean a long way but barely moves a median.
How should I separate my numbers?
Commas, spaces, semicolons or new lines all work, and you can mix them. Paste a column straight from a spreadsheet and it will parse.
What happens to text or blank entries?
Anything that is not a valid number is skipped rather than counted as zero. Check the count shown in the results to confirm every value you expected was read.
Can I average negative numbers?
Yes. Negative values are handled normally and pull the mean down as you would expect.