Standard Deviation Calculator
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Frequently Asked Questions
Standard Deviation Calculator is a free online tool that helps you compute the population and sample standard deviation, variance, and other descriptive statistics for a dataset. It runs entirely in your browser — no sign-up or installation required.
Yes, Standard Deviation Calculator is completely free. There are no hidden charges, subscriptions, or account requirements. You can use it as many times as you like.
Standard Deviation Calculator uses industry-standard algorithms and formulas to ensure accurate results. All calculations are performed locally in your browser for speed and privacy. If you spot an issue, please let us know via the Contact page.