How to Convert Round Area to Square Feet
Rooms come in a variety of shapes so you have to be able to know how to calculate the area. The square-footage of a room is important when considering buying an air-conditioner or heater or carpeting for it. The square-footage is also important if you are renting the area and are paying or charging by the square foot. Once you know the diameter, you can calculate the area of a round room. Does this Spark an idea?
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Instructions
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Circular Rooms
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1
Measure the diameter of the room in feet. The diameter is the distance from one side of the room, through the center to the opposite side.
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Divide the diameter by two to calculate the radius. If the diameter is 20 feet, for example, the radius is 10 feet.
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3
Multiply the radius by itself and multiply by 3.14 to find the area in square feet. The room with a 10-foot radius contains 314 square feet (10*10*3.14).
Oval Rooms
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4
Measure the long diameter, the greatest distance across the room from one side to the other through the center of the room, in feet. Divide by 2 for the long radius.
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5
Measure the short diameter, the shortest distance from one side to the other through the center, in feet. Divide by 2 for the short radius
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6
Multiply the long radius by the short radius by 3.14 to find the area of the room. For example, if the long radius is 13 feet and the short radius is 8 feet, the area of the room is 326.7 square feet (13*8*3.14).
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