Statistics Calculator
Enter your numbers separated by commas or spaces.
This result is an estimate only. Double-check important figures before relying on them.
How it is calculated
- Mean = sum ÷ n
- Median = middle value of the sorted list
- Population SD = √(Σ(x − mean)² ÷ n)
- Sample SD = √(Σ(x − mean)² ÷ (n − 1))
For the mode as well, use the mean, median and mode calculator.
Worked example
4, 8, 15, 16, 23, 42:
- Sum 108, mean 18, median 15.5
- Range 38
Why your number may differ
Use the sample standard deviation unless your list is the whole group. Very large lists may be easier to check in a spreadsheet.
Frequently asked questions
What is the difference between population and sample standard deviation?
Population divides by n and is used when you have every value. Sample divides by n − 1 and is used when your data is a sample of a larger group.
How is the median found?
Sort the numbers and take the middle one. With an even count, average the two middle numbers.
Can I include negative numbers or decimals?
Yes. Use a minus sign and a decimal point, for example −2.5.