Understanding Floor Area Ratio Calculations
The Floor Area Ratio (FAR) is a key metric in urban planning, representing the ratio of a building’s total floor area (including all floors) to the lot area. This calculator helps ensure compliance with zoning regulations by computing FAR accurately.
FAR is used to control building density. For example, an FAR of 1.0 means the total floor area equals the lot area. Higher FARs allow taller or larger buildings, while lower FARs limit density.
FAR Comparison by Zoning Type
| Zoning Type | Typical FAR Range | Example Use |
|---|---|---|
| Residential | 0.5-1.5 | Single-family homes, low-rise apartments |
| Commercial | 2.0-5.0 | Office buildings, retail centers |
| Industrial | 0.5-2.0 | Warehouses, factories |
How to Use the Floor Area Ratio Calculator
- Measure the total floor area of the building in square feet (include all floors).
- Measure the lot area in square feet (the land on which the building sits).
- Click "Calculate FAR" to see the Floor Area Ratio.
- Compare the result to local zoning regulations to ensure compliance.
FAR Comparison Chart
Typical FAR values for different zoning types.
Frequently Asked Questions
What is a typical FAR for residential zoning?
Residential FARs typically range from 0.5 to 1.5, but this varies by city and zoning district. Check local regulations.
What happens if my FAR exceeds zoning limits?
Exceeding zoning FAR limits may require a variance or redesign. Consult local planning authorities.