Standard Deviation Calculator
Paste a list of numbers to get descriptive statistics under both deviation conventions.
How to use
- 1Separate numbers with commas, semicolons or line breaks.
About
Population variance divides by N; sample variance divides by N−1 when there is more than one value.
Standard deviation calculator
Calculate mean, variance and population and sample standard deviations from a list.
Population variance divides squared deviations by n; sample variance divides by n−1. Standard deviation is the square root.
Separate values with commas, semicolons or line breaks.
A larger deviation means values are more spread around the mean.
Practical examples
- For 2, 4 and 6, the mean is 4, population variance 2.667 and population deviation 1.633.
Limitations and notes
- Sample deviation requires at least two values.
- Use valid values and keep all units consistent.
How to use
- 1Paste a list of values.
- 2Review the mean.
- 3Compare population and sample results.
Frequently asked questions
Which deviation should I use?
Use population deviation for a complete population and sample deviation when the list is a sample.
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