📉 Coefficient of Variation Calculator
Enter your data values (leave extra boxes blank if you have fewer than 10) to calculate the coefficient of variation as a percentage.
What is the Coefficient of Variation?
The coefficient of variation (CV) expresses the standard deviation of a data set as a percentage of its mean. Because it’s a relative measure, it lets you compare the variability of data sets that use different units or have very different averages.
The Formula
CV = (sample standard deviation / mean) × 100%. A lower CV means the data is more tightly clustered around the mean relative to its size; a higher CV means the data is relatively more spread out.
- Enter at least two values; leave unused boxes blank.
- CV isn’t meaningful when the mean is at or near zero, since you’d be dividing by a very small number.
Provided for general statistical, scientific, and financial education.
Last reviewed August 2026