Floor Space Index (FSI) Calculator
This calculator helps you determine the Floor Space Index (FSI), also known as the Floor Area Ratio (FAR). FSI is the ratio of a building's total covered area to the plot (land) area. It’s an essential tool for architects, civil engineers, and planners working on zoning, construction limits, and urban development regulations.
Calculate Floor Space Index from Built and Land Area
FSI (FAR) Calculation Formula
$$y = EPVC + g_1 cdot x + frac{(g_2 – g_1) cdot x^2}{2L}$$
Where:
- $$CA$$ — Covered Area (total built-up area)
- $$LA$$ — Land Area (plot size)
The Floor Space Index is a critical zoning metric that controls the density of development.
For example, an FSI of 2.0 means the total built-up area can be twice the size of the land area. Municipal and development authorities use this to regulate building heights, open space, and city planning.