Calculate square footage for rooms, floors, walls, and rectangular spaces using length and width. Quickly estimate total area in square feet, square yards, and square meters.
Feet formula:
Square feet = length (ft) × width (ft)
Metric formula:
Square meters = length (m) × width (m)
This calculator converts your result into square feet, square yards, and square meters automatically.
Square footage is used to estimate how much material you need for flooring, tile, paint, drywall, carpet, and many other home improvement projects.
Adding a small extra percentage can help cover mistakes, cuts, and installation waste.
Your total square footage shows the flat area of the space you entered. This is the base measurement commonly used when planning projects or comparing room sizes.
If you add extra material, the adjusted total can help when ordering supplies for flooring, tile, paint coverage, or similar projects where waste and cuts are expected.
Multiply the length by the width of the area. For example, a 12 ft by 10 ft room is 120 square feet.
Take the square feet result and divide it by 9 to convert to square yards.
If using feet, multiply square feet by 0.092903. If using meters, multiply length by width directly.
For many projects, yes. Flooring, tile, and decking often need extra material for cuts, waste, and installation adjustments.