Average Calculator
Instant results as you type.
Fill in the values — results appear instantly.
An average calculator finds the mean of a list of numbers, along with the median, minimum, maximum, sum, and count. Paste numbers separated by commas or on separate lines — copying a column straight out of a spreadsheet works. Seeing the mean and median together is useful because when they differ a lot, it usually means one or two extreme values are pulling the average around. It runs on your device.
How to use it
- Paste or type your numbers, separated by commas or new lines.
- The mean, median, minimum, maximum, sum, and count appear instantly.
- Compare the mean and median to spot whether outliers are skewing your data.
Examples
- 1, 2, 3, 4 → mean 2.5, median 2.5.
- 10, 20, 40 → mean 23.33, median 20.
Frequently asked questions
- What is the difference between mean and median?
- The mean adds all values and divides by how many there are. The median is the middle value when the numbers are sorted. The median resists extreme values, which is why incomes are usually reported as medians — one billionaire would drag the mean far above what a typical person earns.
- How do I average percentages correctly?
- Only average percentages directly when each one is based on the same size group. If the groups differ, you need a weighted average — multiply each percentage by its group size, add those up, then divide by the total group size.
- Can I paste numbers from Excel?
- Yes. Copy a column and paste it straight in — each value on its own line is handled, as are comma-separated lists. Blank lines are ignored, so a stray empty row is not a problem.
- How does an outlier affect the average?
- Substantially, especially in small sets. In 10, 12, 11, 200 the mean is 58.25 while the median is 11.5. When the two disagree that sharply, check whether the outlier is real data or a typo.