Square Footage Calculator
Calculate the square footage of a room, wall, or land area — then get the material cost. Works in feet, inches, yards, centimeters, or meters.
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How it works
Square footage is simply length times width, with both measurements in the same unit. Convert inches to feet by dividing by 12, then multiply. For multiple identical rooms, multiply by the count.
Formula
Area (sq ft) = Length (ft) × Width (ft) × number of areas
Frequently asked questions
How do I calculate square footage of a room?
Measure the length and width in feet and multiply them. A 12 ft × 10 ft room is 120 square feet. For rooms measured in inches, divide each measurement by 12 first.
How many square feet is a 12x12 room?
A 12-foot by 12-foot room is 144 square feet (12 × 12 = 144).
How do I find square footage of an L-shaped room?
Divide the space into two or three rectangles, calculate the square footage of each, then add them together.