Square Footage Calculator
Measure any area in square feet, square yards and square meters. Enter the dimensions of a room, yard, wall or plot — including L-shaped rooms — and the calculator does the math as you type. Nothing leaves your browser.
Formula: 12 ft × 10 ft
Square feet
120 sq ft
Square yards
13.3 sq yd
Square meters
11.1 m²
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
How do I calculate the square footage of an L-shaped room?
Split the room into two rectangles, calculate each one separately, then add the two areas together. This calculator does it for you — choose the L-shape option and enter the width and height of both sections.
How many square feet are in a square yard?
Nine. One square yard is 3 ft × 3 ft, so divide square feet by 9 to convert to square yards.
Should I measure in inches?
Feet are easiest for rooms and yards. Convert inches by dividing by 12 — 6 inches is 0.5 ft.
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