Area of a Square Calculator FAQs
What is the formula for the area of a square?
The standard formula is A = a^2, where a is the side length. You can also use A = d^2 / 2 from the diagonal, or A = P^2 / 16 from the perimeter.
How do I calculate the area of a square from the side length?
Multiply the side length by itself. For example, if the side is 10 cm, the area is 100 cm^2.
How do I calculate square area from the diagonal?
Use A = d^2 / 2. For example, if the diagonal is 10 cm, the area is 50 cm^2.
How do I calculate square area from the perimeter?
Use A = P^2 / 16. For example, if the perimeter is 40 cm, the area is 100 cm^2.
Can I find the side, diagonal, or perimeter from the area of a square?
Yes. From the area, you can find the side with a = √A, the diagonal with d = √(2A), and the perimeter with P = 4√A.
Is the area of a square different from the area of a rectangle?
A square is a special rectangle with all sides equal. Its area formula simplifies to A = a^2, but it can also be written using the square diagonal or perimeter.
