Standard deviation calculator

Calculate the standard deviation of your dataset to measure how spread out the values are from the mean.

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How to calculate standard deviation

Enter your numeric data directly into the data table or upload a CSV file
Use the "Select Data Column" control to choose which column of data to analyze
The calculator will automatically compute both population and sample standard deviation
View the mean and variance values in the results
Examine the visualization to understand the data distribution and spread

Calculate the variance of your dataset to measure how spread out the values are from the mean.

Calculate different types of means including arithmetic, geometric, and harmonic means. Understand which average is best for your data.

Calculate the range of your dataset to measure the spread between the minimum and maximum values.