Square footage is a measurement of area commonly used in the United States. A single square foot is defined as a square with one foot sides. While the square footage gives you an accurate measurement of the area of a space, the measurement does not tell you the actual number of feet in the square footage measurement. You can, however, calculate the feet per square foot of a space by using a tape measure.
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Measure the length of the space using the tape measure. For example, assume the length of a room is 10 feet.
Measure the width of the space using the tape measure. For example, assume the width of a room is 5 feet.
State the resulting measurements as feet per square footage. Continuing the same example, the feet per square footage of the room is 10 feet by 5 feet and the total square foot age of the room is 50 square feet (10 x 5).