You have to measure the area of the room. Measure both length and width in meters and multiply both to get the area in square meters.
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Divide the diameter by 2 to get the radius. Then use the formula for the area of a circle (pi x radius2).
To find the square footage of a room, you simply multiply the length of the room (in feet) by the width of the room (in feet). The answer is the square footage of the room (assuming the sides opposite each or are equal in length)
In order to calculate the square footage you need to find the length and the width of the room in feet. You multiply the length and the width to give you the square footage of the room
To find the square feet of a room, multiply the length times the width. 12 feet X 12 feet = 144 square feet.
-- Measure the length and width of the room, in feet.-- Multiply the (length of the room) times (the width of the room), in feet.-- The answer is the number of square feet of carpet required to cover the floor of the room.