Sum of Squares Calculator
Find the total sum of squared deviations from the mean.
The heart of variance
The sum of squares adds up how far each value sits from the mean, squared. It is the foundation of variance, regression, and analysis of variance — the raw material of statistical spread.
For 2, 4, 6, 8, 10, the mean is 6 and the total sum of squares is 40. Dividing it by n or n minus 1 gives the population or sample variance.
Fundamental and private
The calculation runs in your browser, so your data is never uploaded.
Frequently Asked Questions
What is the sum of squares?
The sum of each value’s squared distance from the mean. It is the numerator of variance and underlies regression and ANOVA.
What else does it show?
The plain sum of squared values and the mean, for reference.
Why does it matter?
It is a building block of many statistical measures of spread and fit.
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