Calculate the standard deviation of a dataset. Standard deviation measures the average distance from the mean.
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Results
Standard Deviation
2.83
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Formula
Standard Deviation = √Variance
How to Use This Calculator
How to Use
- 1
Enter your numbers (comma-separated).
- 2
Click calculate to find the standard deviation.
Frequently Asked Questions
Frequently Asked Questions
What does standard deviation tell me?
It tells you how spread out data is from the average. Low SD means data is close to the mean; high SD means it's spread out.
What's a 'normal' standard deviation?
In a normal distribution, about 68% of data falls within 1 SD of the mean, 95% within 2 SDs, and 99.7% within 3 SDs.
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About This Calculator
This calculator uses the formula: Standard Deviation = √Variance. All calculations follow industry-standard methods. Results are estimates — always verify with a licensed professional for structural or code-compliant work.
Built and maintained by the CalcSmart team. Last updated March 2026.
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