Square Footage Calculator
Free square footage calculator for rooms, flooring, lots, yards, and construction projects. Supports mixed shapes.
Frequently Asked Questions
How do I calculate square footage?
Multiply length by width in feet for rectangular areas. Divide by 144 if measuring in inches.
How many square feet in an acre?
One acre equals 43,560 square feet.
How do I measure irregular rooms?
Break the shape into rectangles, triangles, or circles. Calculate each separately and sum the areas.