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Coefficient of Variation
Measure the relative variability of a data set by dividing its standard deviation by its mean.
Coefficient of variation
Coefficient of variation: —
Mean: —
Standard deviation: —
Count: — · Sum: —
How to use the Coefficient of Variation
- Type or paste your numbers into the box, separated by commas or spaces.
- Choose the sample formula or the population formula for the standard deviation.
- Read the coefficient of variation as a percentage in the result panel.
Features
- Coefficient of variation as a percentage
- Sample and population standard deviation
- Mean, count and sum of the data set
- Runs locally, no uploads
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Frequently Asked Questions
Common questions about the free online coefficient of variation.
It is the standard deviation divided by the mean, expressed as a percentage, so it shows
variability relative to the average size.
Enter your numbers in the box. The tool divides the standard deviation by the mean and shows
the result as a percentage instantly.
A high value means the data points are widely spread relative to the mean, so the average is
a less reliable summary of the data.
Use it to compare the spread of data sets that have different units or very different means,
such as weights against heights.
Use the sample formula with n minus 1 when your data is a sample, and the population formula
with n when you have every value.
No. The standard deviation is never negative and the mean is treated as a positive size, so
the result cannot fall below zero.
The coefficient of variation is undefined when the mean is zero, because dividing by zero has
no meaning, and the tool says so.
Yes. Paste a column of numbers and the tool splits them on commas, spaces, tabs and new lines
before calculating.
No. Every calculation runs locally in your browser, so your numbers never leave your device.
Yes. It is completely free and unlimited, with no account, no sign-up and no usage limits of
any kind.
Last updated: October 10, 2026