Calculators

Square Footage Calculator

Calculate square footage of a rectangle, circle or triangle from measurements in inches, feet, yards, cm or metres, with an optional price per square foot.

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Enter your values and press Calculate.

How to use the Square Footage calculator

Square footage is the standard way to size rooms, flooring, carpet, sod, paint jobs and real estate listings. Pick your shape and measurement unit, enter the sizes and, if you like, a price per square foot.

For L-shaped or irregular rooms, split the space into rectangles and add them up, or use the multiple-room area calculator.

Formula

Rectangle: length × width. Circle: π × (diameter ÷ 2)². Triangle: ½ × base × height. Measurements are converted to metres first (1 ft = 0.3048 m), and 1 m² = 10.7639 sq ft.

Frequently asked questions

How do I calculate square footage of a room?

Measure the length and width in feet and multiply them. A room 12 ft long and 10 ft wide is 120 square feet.

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