Free FAR Calculator (2025) – Floor Area Ratio/FSI: Max Buildable Area & Area per Floor

Free FAR Calculator (2025) - Floor Area Ratio Calculator

FAR (Floor Area Ratio) Calculator

Calculate the maximum buildable area for your plot.

Maximum Buildable Area

0 sq ft

Understanding Floor Area Ratio (FAR)

Floor Area Ratio (FAR), sometimes called Floor Space Index (FSI), is a critical regulation in real estate and urban planning. It defines the total amount of floor space you are permitted to build on a given plot of land. By multiplying your plot area by the FAR value designated for your locality, you can determine the maximum total floor area for your building. This calculator simplifies this essential calculation, helping property owners, architects, and developers plan their projects in compliance with local regulations.

Frequently Asked Questions (FAQ)

What is Floor Area Ratio (FAR)?

Floor Area Ratio (FAR), also known as Floor Space Index (FSI), is the ratio of a building's total floor area (gross floor area) to the size of the piece of land upon which it is built. It is set by local municipal corporations to regulate the density of construction in an area.

How is the maximum buildable area calculated using FAR?

The maximum buildable area is calculated by multiplying the total plot area by the FAR value. For example, if a plot is 1,000 square feet and the FAR is 2, the maximum total floor area you can build is 2,000 square feet.

Why is FAR important?

FAR is a crucial tool for urban planning. It helps control the density of population and construction, ensures open spaces, and manages the load on civic infrastructure like water, sewage, and electricity. For property owners and developers, it directly determines the development potential of a plot of land.

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