Question 1

How do I calculate the mean, median and mode?

Accepted Answer

The mean is the average (sum ÷ count). The median is the middle value of the sorted list, or the average of the two middle values for an even count. The mode is the value that appears most often. Paste your numbers into this tool to get all three at once.

Question 2

What's the difference between population and sample standard deviation?

Accepted Answer

Use the sample standard deviation (divide by n-1) when the data is a sample of a larger population. Use the population standard deviation (divide by n) when the data is the entire population. This calculator provides both values.

Question 3

What format should I enter the data in?

Accepted Answer

You can paste numbers separated by commas, spaces, tabs, or new lines — one per line is easiest. Decimals, negative numbers and integers are all supported.

Question 4

Is my data private?

Accepted Answer

Yes. All statistics are computed in your browser. No data ever leaves your device.