Free online square footage calculator: calculate the area of any room, house, or property in square feet. Supports multiple shapes including rectangle, square, circle, and triangle. Perfect for flooring estimates, painting projects, tiling, carpet installation, real estate listings, and home improvement planning. Simply select the shape and enter the dimensions to get instant results. No signup required, works entirely in your browser. Mac OS 9 retro style interface.
Choose the shape that matches your area: Rectangle/Square for rooms and properties, Circle for round areas, or Triangle for triangular spaces.
Enter the required measurements in feet. For rectangles, provide length and width. For circles, enter the radius. For triangles, enter base and height.
Click Calculate to instantly see the total area in square feet. The result updates each time you click Calculate.
Q: How do I calculate square footage of a room?
A: Select Rectangle shape, enter the length and width of the room in feet, then click Calculate. Multiply length x width to get the square footage.
Q: Can I calculate square footage of a circular area?
A: Yes, select Circle shape and enter the radius. The calculator uses pi x r squared to compute the area in square feet.
Q: What units does this calculator use?
A: All measurements are in feet (ft), and results are displayed in square feet (sq ft).