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.
How to Use the Standard Deviation Calculator
Calculate population or sample standard deviation:
- 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 fully supported
- Get comprehensive statistical analysis including outliers
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.