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.
Is the Standard Deviation Calculator free and does it require signup?
Yes. Every calculator on Calculatis is 100% free with no registration, and the values you enter are never stored.
How accurate is the Standard Deviation Calculator?
It uses standard, widely-accepted formulas. Results are reliable estimates for general use and are not a substitute for professional advice.