Coefficient of Variation Calculator
Calculate coefficient of variation (CV)
About this calculator
The Coefficient of Variation Calculator determines the relative variability of a dataset by computing the ratio of standard deviation to the mean, expressed as a percentage. This statistical measure is essential for comparing the dispersion of datasets with different units or scales, making it invaluable for risk assessment, quality control, and research analysis. Unlike standard deviation alone, CV provides a standardized measure that allows meaningful comparisons between variables with vastly different magnitudes, helping researchers and analysts make informed decisions about data consistency and reliability.
How to use
Enter your dataset values separated by commas or spaces into the input field. The calculator will automatically compute the mean, standard deviation, and coefficient of variation. The result displays as a percentage, where lower values indicate less relative variability and higher values suggest greater dispersion relative to the mean.
Frequently asked questions
What is a good coefficient of variation value?
Generally, CV below 15% indicates low variability, 15-35% shows moderate variability, and above 35% suggests high variability, though this varies by field and application.
Can coefficient of variation be negative?
No, CV is always positive or zero since it's calculated using absolute values of standard deviation and mean, representing magnitude of relative variation.
When should I use coefficient of variation instead of standard deviation?
Use CV when comparing datasets with different units, scales, or means, as it provides standardized relative variability that standard deviation alone cannot offer.