📊 Standard Deviation Calculator
Calculate population and sample standard deviation, variance, mean, and other statistical measures for your data set. Shows detailed step-by-step calculations and supports multiple input formats.
📝 Enter Your Data
Sample uses N-1, Population uses N in denominator
0 data points
Quick Examples:
📊 Results
📈
Enter at least 2 data points to see calculations
Standard Deviation
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s (sample)
Variance
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s² or σ²
Mean (μ or x̄)
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Count (N)
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Sum
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Min
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Max
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📝 Step-by-Step Calculation
Formula Used:
Calculation Steps:
❓ Frequently Asked Questions
⚠️ Disclaimer
This calculator is provided for educational and informational purposes only. The results are based on the data you provide and standard statistical formulas. For critical statistical analysis or research purposes, please verify results with professional statistical software and consult with a qualified statistician.