Everyday tool
Square Footage Calculator
Enter a room’s length and width to calculate its area in square feet and square meters.
Runs in your browser. No upload.
Enter positive room dimensions. The waste allowance is optional.
Area (ft²)
Area (m²)
Area with waste (ft²)
About this tool
Square Footage Calculator made simple.
Choose feet, inches, meters or centimeters for both dimensions. The optional waste allowance is added to the area estimate; it is not a guarantee of the exact amount of material required.
Common questions
About Square Footage Calculator.
How do I calculate square footage from length and width?
Convert both dimensions to the same unit and multiply length by width. This calculator also shows square meters.
How much extra flooring should I include for waste?
Add a waste allowance based on your project or flooring guidance. The estimate adds that percentage to the measured area; it does not determine the exact amount to buy.