Floor Area Ratio Calculator
Calculate FAR, carpet area, built-up area, and super built-up area for real estate projects
Calculate Floor Area Ratio
Calculation Method
Area Unit
Property Areas
Usable area that can be covered with carpet
Carpet area + wall area
Typical range: 60-80% (default: 70%)
Project Details
Total units in the project
Lobbies, stairs, lifts, corridors
Land Details
Gardens, parks, playgrounds
Total plot/land area
Floor Area Ratio Results
Calculation Formulas:
Analysis
Example Calculation
Residential Project (Competitor Example)
Built-up Area per Unit: 1,400 sq ft
Carpet to Built-up Ratio: 60%
Number of Units: 100
Total Land Area: 4 acres (174,240 sq ft)
Calculation Results
Carpet area per unit: 1,400 × 0.60 = 840 sq ft
Total built-up area: 1,400 × 100 = 140,000 sq ft
Floor Area Ratio: 140,000 ÷ 174,240 = 0.8035
This matches the competitor's example exactly!
FAR Guidelines by Zone Type
Typical Floor Area Ratio limits by development type:
| Zone Type | Typical FAR Range | Description |
|---|---|---|
| Residential Low Density | 0.5 - 1.0 | Single family homes, townhouses |
| Residential Medium Density | 1.0 - 2.0 | Apartments, condominiums |
| Residential High Density | 2.0 - 4.0 | High-rise residential towers |
| Commercial | 1.0 - 3.0 | Offices, retail centers |
| Mixed Use | 1.5 - 5.0 | Residential + commercial |
| Central Business District | 5.0 - 15.0+ | Downtown skyscrapers |
Actual FAR limits vary by local zoning regulations and city planning codes.
Area Types Guide
Carpet Area
Usable floor space
Excludes walls, balconies
Built-up Area
Carpet + wall thickness
Includes internal walls
Super Built-up
Built-up + common areas
Includes lobbies, stairs
Why FAR Matters
Controls urban density and overcrowding
Ensures adequate open space and greenery
Helps compare different property projects
Determines property development potential
Required for building permits and approvals
Understanding Floor Area Ratio (FAR)
What is Floor Area Ratio?
Floor Area Ratio (FAR) or Floor Space Index (FSI) is the ratio of the total built-up area of all floors in a building to the total plot area. It's a critical metric used in urban planning and real estate development.
Types of Areas
- •Carpet Area: Actual usable area for furniture and living
- •Built-up Area: Carpet area plus wall thickness
- •Super Built-up Area: Built-up plus proportionate common area
FAR Calculation Method
Planning Significance
- •Density Control: Prevents overcrowding
- •Infrastructure Planning: Determines utility requirements
- •Open Space: Ensures adequate green areas
Important Considerations
- • Check local zoning regulations for maximum allowable FAR
- • Higher FAR doesn't always mean better value - consider open space
- • Loading factor indicates efficiency of common area utilization
- • Carpet area percentage shows actual usable space efficiency
- • RERA regulations require disclosure of carpet area for transparency