Analyze your data spread with standard deviation, variance, mean, and step-by-step working.
Enter values separated by commas. Choose population or sample calculation.
Enter your dataset to see standard deviation, variance, mean, sum, count, and margin of error.
Review the key values and calculation steps used for your dataset.
This calculator measures how spread out your values are from the mean. Use population when the list is the full dataset, and sample when it represents a larger group.
It shows standard deviation, variance, mean, sum, count, margin of error, and readable calculation steps.
The calculation runs directly in your browser without external service calls.
Calculate population or sample standard deviation, variance, mean, count, sum, and margin of error.
This mathematics calculators page is designed for quick checks, planning, and everyday decision support without forcing users through a heavy workflow.
Enter the required values in the calculator above, review any optional settings, and run the calculation.
For important decisions, compare the output with your own records and professional guidance where needed.
Population variance = sum((x - mean)^2) / n. Standard deviation is the square root of variance.
Example: enter a small dataset to calculate mean, variance, and standard deviation.
Visible answers for users before they rely on a calculator result.
Yes. The Standard Deviation Calculator is free to use in your browser.
No. Treat calculator output as an estimate and verify important finance, medical, tax, legal, or compliance decisions with a qualified professional.
Yes. The page is built to work on mobile, tablet, and desktop screens.