Average Calculator
Paste any list of numbers and instantly get the mean, median, mode and more. Great for grades, expenses, measurements and homework.
Separate with spaces, commas or new lines.
Every common statistic, in one place
Whether you're averaging test scores, monthly spending or a set of measurements, this calculator does the arithmetic for you. Paste your numbers and it works out the mean, median and mode side by side, plus the sum, count, smallest and largest values, the range and the standard deviation — all updating live as you edit.
Which average should you use?
- Mean is the everyday "average" — best when values are evenly spread.
- Median is the middle value — better when a few extreme numbers would skew the mean.
- Mode is the most frequent value — useful for categories or repeated readings.
Tips
You can paste a whole column copied from a spreadsheet — the tool reads one number per line just fine. Non-numeric text is ignored, so stray labels or units won't break the result. For a sample (rather than a full population) standard deviation, the difference is small for large data sets and negligible for quick estimates.
Frequently asked questions
What is the difference between mean, median and mode?
The mean is the sum of all values divided by how many there are. The median is the middle value when the numbers are sorted. The mode is the value that appears most often. Each summarises a data set differently — the mean is sensitive to outliers, while the median is not.
How do I enter my numbers?
Type or paste your numbers separated by spaces, commas, semicolons or new lines. The calculator ignores anything that isn't a number, so you can paste straight from a spreadsheet column.
Can there be more than one mode?
Yes. If two or more values tie for the most occurrences, the data set is multimodal and every tying value is listed. If no value repeats, there is no mode.
What does standard deviation tell me?
It measures how spread out the numbers are from the mean. A small standard deviation means the values cluster close to the average; a large one means they're widely scattered. This tool uses the population standard deviation.
Is my data private?
Yes. Every calculation happens in your browser. Nothing you enter is uploaded or stored.