# Floor space index

Calculate the Floor space index with our free online tool using the input parameters: Area

Floor Space Index (FSI), also referred to as Floor Area Ratio (FAR) or Floor Space Ratio (FSR), represents the ratio between the total floor area of buildings in a specific location and the size of the land in that location, or the restriction imposed on such a ratio. Different types of buildings have varying floor space ratios. To calculate the Floor Space Index, you can use our FSI calculator by entering the land area, the number of flats, and the square footage of each flat. This calculation will help determine the Floor Space Index for the given parameters.

The variables used in the formula are:

`FSI`

= Floor Space Index

`CA`

= Total Constructed Area

`LA`

= Total Land Area