Standard Deviation Calculator
Calculate dispersion and variance for your data set instantly.
Local-first
0 chars
Drop file or paste textSample Std Dev (s)
—
Enter at least 2 numbers
Sample Variance (s²)
—
Mean (Average)
—
Sample Size (n)
—
How this tool works
What it accepts, how to use it, and where your input is processed.
Show GuideHide Guide
How this tool works
What it accepts, how to use it, and where your input is processed.
Show GuideHide Guide
Dispersion Analysis
Standard Deviation measures the amount of variation or dispersion in a set of values. Understand how spread out your data is relative to the mean.
Sample Variance
Our tool uses Bessel's correction (n-1) to provide an unbiased estimate of the population variance from your sample data.
Need an extra feature or found an edge case?Send Feedback
Related tools
Open after you finish the primary task.
ShowHide
Related tools
Open after you finish the primary task.
Mean, Median, Mode Calc
MathCalculate the average, middle value, and most frequent number in a set of data.
Open tool
Z-Score Calculator
MathCalculate the standard score (Z-score) of a value based on the mean and standard deviation.
Open tool
Variance Calculator
MathCalculate the variance of a dataset to understand the spread of your numbers.
Open tool