Standard Deviation Calculator
Calculate mean, variance and standard deviation of a data set.
Result
Results are estimates for general information only and are not professional advice.
Standard deviation
Standard deviation measures how spread out a set of numbers is around the mean. This calculator returns the mean, variance and standard deviation, with the correct divisor for either a sample (n−1) or a whole population (n).
Frequently Asked Questions
What is the Standard Deviation Calculator?
Calculate mean, variance and standard deviation of a data set. It runs instantly in your browser and is completely free to use.
What do I need to enter to use the Standard Deviation Calculator?
The Standard Deviation Calculator asks for the following values (2): Numbers (comma separated), Data set. Fill them in and the result appears immediately — the calculation runs on your own device, so nothing you type is sent to a server.
How accurate is the Standard Deviation Calculator?
The Standard Deviation Calculator uses standard, widely-accepted formulas, so its figures are reliable estimates for everyday planning. They are not a substitute for advice from a qualified professional.
Is the Standard Deviation Calculator free, and do I need an account?
Yes. The Standard Deviation Calculator — and every other calculator on Calculatis — is completely free, with no registration, no download and no limit on how often you use it.