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*Calculate the area of a square in seconds with our online calculator! Simply enter the measurement from the side and get the surface of your square.*

## The Formula to Find the Area of a Square

The simplest method for measuring the area of a square (r) is to obtain it with the measurement on one side (A). Thus, the formula is:

### A X A = r

This is equivalent to saying that the area of a square is equal to its square side:

### A² = r

## Definition: Area of a Square

The area *(also called the surface)* of a square is a relative size in space that makes it possible to measure what is also called the area. If we stick to the square, which is a quadrilateral with equal sides, the area is none other than the inner zone delimited by the sides of the square. The area is expressed in square *(mm², cm², m² etc.)*.

## Calculate the Area of a Square as a function of x

Many mathematical problems require us to use the variable x to calculate the area of a square. If there is no single formula *(since there is no single problem)*, we recommend that you rely on the properties of the other geometric figures to find the value of the variable. Generally, you have the diagonal *(use the formulas of the triangle)* or another figure is integrated into the square *(another square or a rectangle)*. To solve your mathematical problem, you will have to rely on all the geometric rules you know.