Floor Area Index Formula

Those portions of each story above the ground surface prior to any manipulation or grading are usually included in the calculation.

Floor area index formula. Floor area ratio is sometimes called floor space ratio fsr floor space index fsi site ratio or plot ratio. Let us consider an example to calculate the floor space index value. Adding to this confusion is the practice among some developers to use gross leasable area gla and gfa interchangeably or to use. It is the ratio of total land area to the buildings total floor area.

Index numbers are values expressed as a percentage of a single base figure. Floor space index fsi is also known as floor area ratio far or floor space ratio fsr. The difference between far and fsi is that the first is a ratio while the latter is an index. Gross floor area is the sum of the floor area of each.

Calculate the area of each story floor of the building typically measured between the exterior walls. Determine the gross floor area of the building. It is also referred as floor area ratio. Assume a building contractor constructs 100 flats.

The floor area ratio of a 1 000 square foot building with one story situated on a 4 000 square foot lot would be 0 25x. It is the ratio of the total floor area of buildings on a certain location to the size of the land of that location or the limit imposed on such a ratio. Use this calculator to work out the floor area of a room if you re room is rectangular then simply enter the width and depth of the room and the unit of measure and the resulting floor area of the room will be calculated in several different units of measure both metric and imperial useful if you are meauring the room in one unit but for example the. Calculating the floor area of a room.

Floor space ratio varies for different types of buildings. Thus an far of 1 5 is translated as an fsi of 150. Definitions of gfa including which areas are to be counted towards it and which areas aren t vary around the world. Gross floor area gfa in real estate is the total floor area inside the building envelope including the external walls and excluding the roof.