Standard Deviation Calculator

Calculate standard deviation, variance and mean

standard deviationvariancemeanstatistics

📖 How to Use

Enter data separated by commas
Click Calculate to see the mean, variance, and standard deviation

📐 Formula

Mean μ = Σxᵢ/n
Variance σ² = Σ(xᵢ−μ)²/n
Std Dev σ = √σ²

❓ FAQ

What's the difference between standard deviation and variance?▾

Variance is the average of squared differences from the mean; standard deviation is its square root, sharing the same unit as the data.

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About Standard Deviation Calculator

This tool is completely free, no registration required. Works directly in your browser. Supports both PC and mobile devices.

Standard Deviation Calculator is a free online tool that works on both PC and mobile. No registration or download required — just open in your browser. Results are accurate and reliable for everyday use and professional reference.