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Linear Feet and Square Feet

Linear feet and square feet are different units of measure. Linear feet (or simply feet) measure the length of an object or the perimeter of something, such as the length of a board or the total length of the four walls around a room. Square feet measure the area of an object, such as the total floor area of a room.

To calculate linear feet, all you have to do is measure the length of the object. To calculate the area (square feet) of a square or rectangular object, multiply the length of two of the adjoining sides. Areas of objects, such as circles, triangles, or irregularly shaped objects can be calculated using unique formulas or dividing the irregular shapes into smaller parts and adding the areas of the smaller parts together.

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