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About the Deviation Calculator
The Deviation Calculator computes standard deviation, variance, mean, and related statistical measures for any set of numbers. Enter your data and receive a full breakdown with interpretation of each result.
The tool applies the standard deviation formula: the square root of the summed squared distances from the mean, divided by n minus 1 for a sample or by n for a population. You only need a list of numeric values, separated by commas or spaces. It also reports the variance, count, sum, and mean. Tip: choose sample mode when your data is a subset, and population mode when it includes every member of the group.
- Type your numbers into the input field, separated by commas or spaces.
- Select sample or population mode to match your data.
- Press calculate and review the standard deviation, variance, and mean with interpretation.