Standard Deviation Calculator
Standard Deviation Calculator by NIVITA HUF. Model scenarios, review calculations, explore detailed breakdowns and export results. Useful free planning tool.
Set your assumptions
Update the values to calculate your scenario.
Your calculation
Results update as you enter information.
JavaScript is required for interactive calculations.
How this calculator works
σ = sqrt(Σ(x−mean)^2 / n).
Important assumptions
For statistical values, enter observations as comma-separated numbers. GPA depends on your school grade scale. Random output updates on recalculation.
About the Standard Deviation Calculator
What inputs are needed for the Standard Deviation Calculator?
The calculator supports Value A / numerator / lower bound; Value B / denominator / upper bound; Percentage / multiplier; List of numbers separated by commas; Corresponding weights (optional); Calculation / format mode. You can change each applicable input and immediately recalculate.
How does the Standard Deviation Calculator calculate its results?
σ = sqrt(Σ(x−mean)^2 / n).
Can I save or share my calculation?
Yes. Use Export CSV for the results table, Copy results for a summary, Share scenario for an input-preserving link, or Print to keep a copy. No sign-in is needed.
Are calculator results guaranteed?
No. Calculations depend on the values entered and the assumptions shown. Financial products and regulatory rules can change, and investment projections do not guarantee returns.