TabLab

Standard deviation calculator

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

Population Statistics

11.37
129.29

Sample Statistics

10.98
120.67

Mean

81.00
The population standard deviation is 11.37 (variance: 129.29), and the sample standard deviation is 10.98 (variance: 120.67). About 68% of the data falls within ±1 standard deviation of the mean (81.00).

Distribution Plot

How to calculate standard deviation

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

Related Calculators and Graph Makers

Variance calculator

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

Mean Calculator

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

Range calculator

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

by @scottpaulin