How to Use Square Calculator

About this tool

Squaring a number means multiplying it by itself. The square calculator does this exactly for any number, including decimals, negative numbers and very large values, and also shows the cube (the number multiplied by itself three times) and the result in scientific notation.

How to use Square Calculator

1. Enter a number.
2. Read its square, cube and scientific notation.
3. Use the square root calculator to go the other way.

Worked example

12.5² = 12.5 × 12.5 = 156.25, and 12.5³ = 1,953.125.

What is the square of a negative number?

It is always positive, because a negative times a negative is positive: (−4)² = 16.

Where are squares used?

In areas (a 5 m square room has 25 m² of floor), the Pythagorean theorem, statistics and physics formulas.

What is a perfect square?

A whole number that is the square of another whole number, such as 1, 4, 9, 16 and 25.

Put this guide into practice

• Square Calculator — Find the square (and cube) of any number, exactly.