# Square Foot Calculator

If you are mulching a flower bed, knowing the square footage of the area is essential to knowing how much mulch you should purchase. If you are laying carpet in your home, then you will need to calculate how many square feet are in each room to figure out how much carpet will be needed for the job. In addition to taking the guesswork out of many do-it-yourself jobs, this calculator can also be beneficial for students who may need help with various math problems.

## Square Foot Formulas

When it comes to the formulas used for calculating total square footage, you are simply determining the area of the shape in question, using very geometry math. The most common square feet area formulas are:

- Square:
*A = s2 (Side Squared)* - Rectangle:
*A = ab (Side A x Side B)* - Circle:
*A = πr2 (Pi x Radius Squared)*

## How To Calculate Square Footage

Learning how to calculate square footage is easy. To quickly calculate square feet without doing the math by hand, simply enter the dimensions of any object shape into the calculator below and leave the number crunching to us. If you need to make these calculations but don’t have access to a square foot calculator, you can easily memorize the formulas listed above.