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To figure out the square footage of an area, one must first measure the sides of the area or the diameter of the area if the area is round. Then, depending on the shape of the area, the appropriate formula must be applied to determine the square footage.

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To calculate the square footage of a square or rectangle, measure the length and width of the area in feet, then multiply length by width to determine square footage. Different formulas are used to calculate the square footage of different shapes.

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Square footage of a room is a measurement of area, so calculating it requires the length of the room and the width. By placing a tape measure at the edge of one wall and measuring a perfectly straight line to the opposite wall, a measurement can be obtained.

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To determine the square footage of a rectangle, multiply the length by the width. The answer is in given square units. For example, if a lawn is 20 feet by 30 feet, the measurement is 600 square feet. This is also referred to as "area."

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Calculate the square footage of the room by measuring the length and width, rounding up to the nearest half-foot, and then multiplying these numbers to get the number of square feet. Rooms with non-rectangular shapes require additional calculations.

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To calculate an object's square footage, first measure the height and length. Ensure the height and length have the same units, then multiply them together to find the square footage.

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To calculate square footage using an online calculator, enter the length and width of the rectangle. Calculatorsoup.com and Calculator.net contain square footage calculators, with the latter one also including square footage calculators for triangles and circles.

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The United States Census states that the average square footage of a house is 2,598 square feet. The average house size has increased by more than 1,000 square feet in the last 40 years.

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To measure the square footage of a room, use a measuring tape to determine both the width and the length of the room, and then multiply the length of the room by the width of the room. Materials needed include a tape measure.

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To get the square footage of a home, measure the exterior walls of each floor of the home to the nearest inch. Once the measurements are done for each floor, multiply the length and the width, and add all of the floors' measurements together.