Examples That Show How to Calculate Floor Area Ratio Easily


Did You Know?

“Floor space proportion” (FSR), an option term for FAR, is utilized as a part of the United States and Canada. In the United Kingdom and Singapore, the expression “plot proportion” is utilized as an option.

FAR is the shortening for Floor Area Ratio. FAR is characterized as ‘the proportion of a building’s aggregate floor range (Gross Floor Area) to the zone of land whereupon it is assembled’. The built territory would incorporate the fundamental structure, outside dividers, staircases or entryway space, assuming any. The proportion is gotten by partitioning the aggregate territory worked by the region of bundle of land whereupon it is assembled.

The Gross Floor Area incorporates all the space inside the outside dividers of the development under review, including all tenable and inhabitable spaces in it.

FARs incorporates all the tenable territory in the building, and avoids zones, for example, parking garages. The tenable territories, as indicated by the predefined construction laws, are the spaces utilized for living, cooking, eating, and resting. Toilets, storerooms, passages, corridors, utility and capacity territories are not considered as livable spaces.


Floor region proportion = (Total secured zone on all floors of all structures on a specific plot)/(Area of the plot)

on the other hand

FAR = (Gross Floor Area)/(Area of the plot)

FAR is utilized for building up the zoning codes by the administration’s arranging office. The zoning code for a package of land specifies the admissible floor space that might be developed on it. The modeler may take up the whole floor space in a solitary story or may go for different floors or stories, having a relatively littler impression. The vertical and even restrains must be balanced, in order to submit to the admissible tallness and FAR for that package.

A higher FAR for a territory is demonstrative of more floor space accessibility around there. Likewise, it has been watched that zones inside higher FARs are known to have a higher land cost.

Distinctive urban communities have diverse laws in regards to the most extreme Floor Area Ratio that a building can possess. A FSR delineate the greatest property that can be developed for business and non-business purposes in a specific district. That is, it confines the aggregate region that can be developed upon a package of land accessible.


Computation of FAR

Step 1: Calculate the zone of the bundle by increasing the length and width of the development site accessible.

Step 2: Calculate the zone of each of the stories in the arranged building.

Step 3: Add up the individual impression of every story to get the aggregate square film.

Step 4: Divide the aggregate square film of the building’s stories with the zone of the bundle or the recording of the building.



Range of site

Range of bundle or plot = 38,000 sq. ft

Case of FAR count

The gross floor range = 5,000 sq. ft + 3,000 sq. ft + 4,000 sq. ft + 3,000 sq. ft = 15,000 sq. ft


Floor range proportion (FAR) = 15,000/38,000 = 0.3947 FAR

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