Building Floor Space Index Calculator

FSI Formula:

\[ FSI = \frac{\text{Total Floor Area}}{\text{Plot Area}} \]

Floor Space Index (FSI):

Unit Converter ▲

Unit Converter ▼

From:	To:

1. What is Floor Space Index (FSI)?

Floor Space Index (FSI), also known as Floor Area Ratio (FAR), is a critical urban planning parameter that determines the maximum permissible floor area that can be built on a plot. It is calculated as the ratio of a building's total floor area to the size of the plot of land upon which it is built.

2. How Does the Calculator Work?

The calculator uses the FSI formula:

\[ FSI = \frac{\text{Total Floor Area}}{\text{Plot Area}} \]

Where:

Total Floor Area — Sum of all floor areas in the building (m²)
Plot Area — Total area of the land plot (m²)

Explanation: FSI indicates how dense or intense the development on a particular plot can be. Higher FSI values allow for more construction on a given plot.

3. Importance of FSI Calculation

Details: FSI is crucial for urban planning, zoning regulations, and determining the permissible construction limits. It helps maintain orderly development, controls population density, and ensures adequate light, air, and open spaces in urban areas.

4. Using the Calculator

Tips: Enter the total floor area and plot area in square meters. Both values must be positive numbers. The calculator will compute the FSI ratio.

5. Frequently Asked Questions (FAQ)

Q1: What is a typical FSI value?
A: FSI values vary by location and zoning regulations. In dense urban areas, FSI might be 3-5, while in suburban areas it's typically 1-2.

Q2: Does FSI include basement areas?
A: This depends on local regulations. In some areas, basements are excluded from FSI calculations if used only for parking or utilities.

Q3: Can FSI be transferred between properties?
A: Some municipalities allow transfer of development rights (TDR), where FSI can be transferred from one property to another.

Q4: How does FSI affect property value?
A: Higher FSI typically increases property value as it allows more construction, but it's balanced by infrastructure capacity and urban planning considerations.

Q5: Are there exceptions to FSI regulations?
A: Some areas offer FSI bonuses for including public amenities, affordable housing, or sustainable design features in developments.