Using the calculator
Enter the values requested above. Calculate population and sample standard deviation, variance and mean.
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Standard Deviation Calculator
Calculate population and sample standard deviation, variance and mean.
Enter the values for the problem
Enter the numbers, equation values, scores, or dimensions requested by the standard deviation tool. Review the supporting outputs to check the result and understand the relationship between the values.
Important: Use the inputs that match your situation. Results are estimates based on the values and assumptions entered.
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How to use this calculator
Reading the result
The result shows population and sample standard deviation, variance and mean.
How it is calculated
Standard deviation summarizes how far values typically spread from the mean. Population and sample calculations use different divisors, so choose the result that matches whether your list represents the full population or a sample.
Results are estimates based on the values entered. Review the Methodology and Calculator Disclaimer for important limitations.