Standard Deviation Calculator
Calculate standard deviation, variance, mean, and other statistical measures for your data set.
Enter Your Data
Enter numbers separated by commas, spaces, or line breaks
About
📊 Standard Deviation
Measures the amount of variation or dispersion in a data set.
📈 Variance
The average of squared differences from the mean.
🔢 Sample vs Population
Sample (n-1) for partial data, Population (n) for complete data.
Formulas
Sample Standard Deviation:
s = √[Σ(x - μ)² / (n-1)]
Population Standard Deviation:
σ = √[Σ(x - μ)² / n]
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