PDF Tools Calculators Contact Log In
Result
--
Enter values to calculate.
Summary
--
Waiting for input
Detail
--
Waiting for input

Calculate the coefficient of variation — standard deviation expressed as a percentage of the mean.

How It Works

How Coefficient of Variation Calculator Works

Dividing the standard deviation by the mean (and multiplying by 100) expresses variability relative to the average size of the data, which makes it possible to compare spread between data sets with very different units or scales.

FAQ

Frequently Asked Questions

Why not just compare standard deviations directly?
A standard deviation of 10 means something very different for data averaging 20 versus data averaging 10,000 — the coefficient of variation normalizes for that by expressing spread as a proportion of the mean, making the comparison meaningful.