Average Calculator
Paste a list of numbers and get the mean, the median, the mode and the rest at once. Separate them however you like. Nothing is uploaded.
Commas, spaces, new lines, tabs or semicolons — all work, and you can mix them.
How to use it
- Paste or type your numbers on the left.
- Separate them with commas, spaces or new lines — whatever your data already uses.
- Every result updates as you type. Press Copy results to take them all with you.
Mean, median and mode are three different questions
People say “average” and almost always mean the mean: add everything up, divide by how many there are. It is the right tool most of the time, and it has one weakness that matters.
The mean is dragged around by extreme values. Nine people earning 30,000 and one earning 5,00,000 have a mean salary of 77,000 — a number that describes nobody in the room. The median, the middle value once the list is sorted, stays at 30,000 and tells the honest story.
The mode is the value that appears most often. It is the only one of the three that works on things you cannot add up, like shirt sizes or survey answers, and it is the right question when you want to know what is most common rather than what is typical.
A quick rule: if the mean and the median on this page are far apart, your list has outliers, and the median is probably the number you should quote.
Range and standard deviation
Range is simply the largest number minus the smallest. It tells you how spread out the list is, using only two values, which makes it quick but fragile — one freak number changes it entirely.
Standard deviation answers the same question more carefully: on average, how far is each number from the mean? A small standard deviation means the values huddle close together; a large one means they are scattered. This page reports the population standard deviation, which treats your list as the whole group rather than as a sample drawn from a larger one.
Frequently asked questions
What is the difference between mean, median and mode?
The mean is the total divided by how many numbers there are. The median is the middle number once they are sorted. The mode is the number that appears most often. They answer different questions, and when a list has a few very large or very small values they can be far apart.
When should I use the median instead of the mean?
Whenever a few extreme values would drag the mean away from what is typical. Salaries are the classic case: one very large salary lifts the mean above what almost everyone earns, while the median stays with the middle person. If the mean and median on this page are far apart, that is your signal.
How should I separate my numbers?
However you like. Commas, spaces, new lines, tabs or semicolons all work, and you can mix them. Negative numbers and decimals are fine. Anything that is not a number is ignored and counted separately so you know it was skipped.
Is my data sent anywhere?
No. The arithmetic happens in JavaScript inside your own browser. Nothing is uploaded and nothing is saved — close the tab and it is gone.