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The square foot (plural square feet; abbreviated ft2 or sq ft) is an imperial unit and U.S. customary unit (non-SI, non-metric) of area, used mainly in the United States and partially in Canada, United Kingdom, Hong Kong, Bangladesh, India and Pakistan. It is defined as the area of a square with sides of 1 foot. A symbol for square foot, square feet, and "per square foot" commonly used in architecture, real estate and interior space plans is a simple square with a vertical line bisecting it. It is also occasionally written as a square with a slash through it. To calculate the Square footing of an area, multiply the length of one side of a regular quadrilateral multiplied by the length of an adjacent side (for example, a rectangle of 0.5 foot by 2 foot would cover 1 square foot). == Conversions == 1 square foot is equivalent to: * 144 square inches (Sq In) * 1/9 square yards (Sq Yd) * 0.09290304 square metres (symbol: m2) 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Square foot」の詳細全文を読む スポンサード リンク
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