Coefficient of Variation Calculator
Find relative variability as a percentage of the mean.
Spread relative to the mean
The coefficient of variation scales the standard deviation by the mean, giving a unitless percentage. That makes it perfect for comparing the variability of data sets measured on completely different scales.
The set 10, 12, 14, 16, 18 has a mean of 14 and a sample standard deviation of about 3.16, for a coefficient of variation near 22.6%. A lower percentage means more consistent data.
Comparable and private
The calculation runs in your browser, so your data is never uploaded.
Frequently Asked Questions
What is the coefficient of variation?
The standard deviation divided by the mean, as a percentage. It measures relative spread, comparable across data sets of different scales.
Why use it over standard deviation?
Because it is unitless, it lets you compare the variability of, say, prices and weights on equal footing.
Sample or population?
This uses the sample standard deviation.
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