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Standard Deviation & Variance Calculator
Population or sample.
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About Standard Deviation & Variance Calculator
Compute variance and standard deviation for population or sample data.
📐 Methodology & Reference Accuracy:
Calculations, formulas, and conversions execute locally in your web browser. Output models are benchmarked against official reference standards and updated for 2026.
🔒 This tool runs entirely in your browser. Nothing is uploaded or stored.
Background reading: Std Deviation on Wikipedia. More: all calculators.
Frequently Asked Questions about Standard Deviation & Variance Calculator
How do I use the Standard Deviation & Variance Calculator?
Open the Standard Deviation & Variance Calculator and use the controls in the workspace below: population or sample. Results appear instantly in your browser, with nothing to install, sign up for, or pay for.
Is the Standard Deviation & Variance Calculator free?
Yes. The Standard Deviation & Variance Calculator is completely free, like every tool in the PrimeFreeTools library. There are no accounts, subscriptions, or usage limits.
Does the Standard Deviation & Variance Calculator store or share my data?
No. The Standard Deviation & Variance Calculator runs with JavaScript in your browser, so what you enter never leaves your device and nothing is stored on a server.
What can I use the Standard Deviation & Variance Calculator for?
Compute variance and standard deviation for population or sample data. You will find it grouped under Calculators together with 116 other free tools on the PrimeFreeTools homepage.
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