Square Footage Calculator
Calculate the square footage of any space — rooms, floors, or land.
Shape & Dimensions
What is the Square Footage Calculator?
The Square Footage Calculator is an essential geometric tool for real estate agents, flooring contractors, and painters. It accurately calculates the total 2D area of a space, allowing you to price out homes, order carpet, or buy the correct amount of paint.
How It Works (Formula)
For a standard rectangular room, the formula is simply Length multiplied by Width. For complex houses, the tool allows you to mathematically break the floorplan into multiple smaller rectangles, calculate the area of each, and sum them together.
$$ \text{Area (sq ft)} = \text{Length (ft)} \times \text{Width (ft)} $$
The foundational geometry formula for 2D rectangles.
How to Use It
Measure the length and width of your room in feet or inches. Enter those dimensions into the tool. It will instantly output the total square footage. If you have an L-shaped room, treat it as two separate rectangles and add the results.