Full form of FSI and FAR and it’s calculation

Posted by

FSI is the abbreviation of the Floor Space Index, Whilst FAR is for Floor Area Ratio. They both are used as a part of Building Bye-Laws.

Floor Space Index or FSI is defined as the ratio of the total carped area or total floor area of a building to the area of land on which the building stands.

Calculation of Floor Space Index

Let’s take an example. Suppose we have a four storied building with the following data.

Area of ground floor = 140 m2

Area of first floor = 140 m2 (same as above)

Area of second floor = 80 m2 (due to setback)

Area of third floor = 80 m2

And the area of land on which the building stands is 300 square meters.

Here we have a total floor area is 140 * 2+ 80 * 2= 440 square meters.

Now we will divide the total floor area by the land area.
example for floor space index

In this case, FAR is = 1.47

example of floor space index

Other Relevant Articles-
Causes, effects, and remedies of dampness in building

Criteria For Selection Of The Repair Material

Purposes And Types Of Skirting In Building Construction

Other Online Resources-

Unified Development Control And Promotion Regulations – Maharashtra PDF


What is the full form of TDR?

TDR means Transfer of Development Rights.

What is floating FSI?

Floating FSI allows use of extra FSI of one building in another building under project.