Standard Deviation Calculator

Calculate standard deviation, variance, mean, sum, and margin of error for your data set. Essential statistical tool for data analysis and research applications.

It is a:
Population: Select if the data contains all measurable values, or all of the values you are interested in.

Sample: Select if the data is a sample of a large or unlimited population and you wish to make a statement about the entire population.

Instructions:

  • Enter numbers separated by commas (e.g., 1, 2, 3, 4, 5)
  • Choose between Population or Sample calculation
  • At least 2 numbers are required for calculation
  • Decimal numbers are supported

Frequently Asked Questions About Standard Deviation