Coefficient of Variation Calculator vs Standard Deviation Calculator
Two calculators for the same neighbourhood of questions. Here is what each measures, what you feed in, and where you'd reach for one over the other.
Coefficient of Variation Calculator
Compute the coefficient of variation (CV), a dimensionless measure of relative variability defined as the standard deviation divided by the mean, expressed as a percentage. Used to compare variability across datasets with different units, magnitudes, or context — investment risk, biological variability, measurement precision.
- Answers
- Coefficient of Variation (%)
- Inputs
- Standard Deviation, Mean
Standard Deviation Calculator
Compute the sample standard deviation directly from three summary statistics — sample size n, the sum of values Σx, and the sum of squared values Σx². This is the spread metric used in virtually every empirical study, quality-control chart, and risk model.
- Answers
- Standard Deviation
- Inputs
- Sample Size, Sum of Values, Sum of Squares
At a glance
| Coefficient of Variation Calculator | Standard Deviation Calculator | |
|---|---|---|
| Category | Statistics | Statistics |
| Answers | Coefficient of Variation | Standard Deviation |
| Inputs | 2 | 3 |
| Result unit | % | — |
When to use each
Compute the coefficient of variation (CV), a dimensionless measure of relative variability defined as the standard deviation divided by the mean, expressed as a percentage. Used to compare variability across datasets with different units, magnitudes, or context — investment risk, biological variability, measurement precision.
Compute the sample standard deviation directly from three summary statistics — sample size n, the sum of values Σx, and the sum of squared values Σx². This is the spread metric used in virtually every empirical study, quality-control chart, and risk model.