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Floor area ratio (FAR) (also floor space ratio (FSR), floor space index (FSI), site ratio and plot ratio) is the ratio of a building's total floor area (gross floor area) to the size of the piece of land upon which it is built. The terms can also refer to limits imposed on such a ratio. As a formula: Floor area ratio = (total covered area on all floors of all buildings on a certain plot, gross floor area) / (area of the plot) Thus, an FSI of 2.0 indicates that the total floor area of a building is two times the gross area of the plot on which it is constructed, as would be found in a multiple-story building. ==Terminology== The terms most commonly used for this measurement vary from one country or region to the next. In Australia ''floor space ratio'' (FSR) is used in New South Wales〔(NSW Department of Planning ), retrieved 19 August 2010〕 and ''plot ratio'' in Western Australia.〔(Quick Start Guide to Town Planning in the City of South Perth ), retrieved 19 August 2010〕 In India ''floor space index'' (FSI) and ''floor area ratio'' (FAR) are both used.〔(India Environment Portal ), retrieved 19 August 2010〕〔http://www.townplanning.in/database_show.asp?id=124, retrieved 30 December 2010〕 In the United Kingdom and Hong Kong both ''plot ratio'' and ''site ratio'' are used.〔(University of Dundee: Town and Regional planning ), retrieved 19 August 2010〕〔() () 〕 In Singapore the terms ''plot ratio'' add ''gross plot ratio'' (GPR) are more commonly used. In the United States and Canada, ''floor space ratio'' (FSR) and ''floor area ratio'' (FAR) are both used.〔(【引用サイトリンク】title=NYC Zoning - Glossary )〕 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「floor area ratio」の詳細全文を読む スポンサード リンク
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