Room Square Footage Calculator
Working out the square footage of a room is the first step in almost every home project — flooring, paint, tile or furniture. Measure the length and width, choose L-shape if the room has a bump-out, and read the area in square feet, square yards and square meters instantly.
Formula: 12 ft × 10 ft
Square feet
120 sq ft
Square yards
13.3 sq yd
Square meters
11.1 m²
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How to use this square footage calculator
- Pick the shape that matches your area.
- Enter the dimensions in feet.
- Read the area in square feet, square yards and square meters.
- For an L-shaped room, split it into two sections and add both.
- Round up when ordering materials — suppliers sell in whole units.
Frequently asked questions
Do I measure the floor or the walls?
Floor area is length × width. Walls are a different calculation — for painting, use a paint calculator, which accounts for wall height, doors and windows.
My room is not a perfect rectangle. What do I do?
Split it into sections and add them together. Most rooms can be broken into two or three rectangles; the L-shape option handles the common bump-out case in one step.
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