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Square Calculator
x² — square of any number.
Enter values to see your result
Frequently asked questions
Square of negative?
Always positive. (−3)² = 9. Because negative × negative = positive.
Square of 0 and 1?
0² = 0. 1² = 1. Only two numbers whose square equals themselves.
Why "square"?
Area of a square with side x is x × x = x². Geometry origin of the name.
Relation to standard deviation?
Variance = mean of squared deviations. Squaring removes signs and weights outliers.