Square Footage Calculator
Calculate the area of one or more rectangular rooms, walls, floors or material sections from length and width. Enter dimensions in feet, inches, yards, meters or centimeters and add an overage percentage for material planning.
Area per rectangle120 ft²
Total area120 ft²
With overage120 ft²
Square meters11.15 m²
How this tool works
Rectangle area = length × width. Input dimensions are first converted to feet, then areas are summed and optional overage is applied.
Example
A 12 ft by 10 ft room contains 120 square feet. Adding 10% material overage gives 132 square feet.
Common questions
How do I handle an L-shaped room?
Split it into rectangles, calculate each rectangle, and use the quantity or repeat the calculation for each section.
Can it convert the result to square meters?
Yes. The output includes both square feet and square meters.