Basic Statistics
Standard Deviation Calculator
Upload a CSV file or paste data to calculate mean, variance, standard deviation, range, and coefficient of variation.
← Back to Tools
Upload CSV or Use Example Data
You may upload a CSV and select a numeric column, or paste a simple list of values.
Interpretation
Use sample standard deviation when the data are a sample from a larger process or population. Use population standard deviation only when the values represent the full population of interest.
s = sqrt( Σ(xᵢ - x̄)² / (n - 1) )