Small House
Lot Area: 5,000 square feet; Building Footprint Area (Ground Floor): 1,200 square feet; Number of Floors: 1 floors
Total Building Area: 1,200 square feet; Floor Area Ratio (FAR): 0.24
Floor Area Ratio (FAR) Calculator
Construction0.0(0)
Calculates the Floor Area Ratio (FAR) for a property, which is the ratio of a building's total floor area to the size of the piece of land upon which it is built.
How To Use
How to use this calculator
Start with your values, or try a preset.
Step 1
Enter Lot Area, Building Footprint Area (Ground Floor), and Number of Floors in the units shown.
Step 2
Read Total Building Area and Floor Area Ratio (FAR) in the results panel. Results update as you change the inputs.
Step 3
Choose a preset to load an example, then adjust the values for your situation.
Worked Examples
Example calculations
See the inputs and their calculated results.
Two-Story House
Lot Area: 7,500 square feet; Building Footprint Area (Ground Floor): 1,500 square feet; Number of Floors: 2 floors
Total Building Area: 3,000 square feet; Floor Area Ratio (FAR): 0.4
Large House
Lot Area: 12,000 square feet; Building Footprint Area (Ground Floor): 3,000 square feet; Number of Floors: 2 floors
Total Building Area: 6,000 square feet; Floor Area Ratio (FAR): 0.5
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