FREE ONLINE TOOLFree Standard Deviation
Free Standard Deviation
Calculator
Calculate exact variance and standard deviation from raw data, frequencies or summary statistics. Compare datasets, inspect z-scores, CV, standard error and empirical coverage.
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About Free Standard Deviation Calculator
Calculate standard deviation from raw values, a frequency distribution, or sufficient summary statistics—and compare two datasets side by side. Exact variance and sum-of-squares math stay visible.
Workspace options
- Use as
Available actions
- Raw data
- Frequency data
- Summary stats
- Compare datasets
- Calculate spread
- Load example