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Variance Calculator
Find sample and population variance of a data set.
How spread out is the data?
Variance quantifies spread by averaging the squared distances of each value from the mean. A larger variance means the data is more scattered; zero means every value is identical.
The set 4, 8, 15, 16, 23, 42 has a sample variance of 182 and a population variance of about 151.7. The square root of each is the standard deviation.
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The calculation runs in your browser, so your data is never uploaded.
Frequently Asked Questions
What is variance?
The average of the squared differences from the mean. It measures how spread out the data is.
Sample or population?
Sample variance divides by n minus 1; population variance divides by n. The tool shows both.
How do I enter data?
Paste numbers separated by spaces, commas, or new lines.
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