Floor Area Ratio (FAR) Calculator
Result
Floor Area Ratio (FAR) Calculator The Floor Area Ratio Calculator divides total building floor area by the lot area to give the FAR, a key zoning metric. Enter the total floor area and lot area. — free online calculator.
Formula
- Floor Area Ratio (FAR) Calculator calculates its result from Total Building Floor Area, Lot Area. It uses the formula FAR = Total Building Floor Area ÷ Lot Area. Change any input to recalculate the result instantly.
- The main inputs are Total Building Floor Area, Lot Area. Enter them in the units and format shown in the calculator.
- Keep measurements and project assumptions consistent before comparing or combining values.
- Changing any input above recalculates the result with the same calculation engine used by this page.
Example: Floor Area Ratio (FAR)
- Total Building Floor Area: 3000
- Lot Area: 2000
Using Total Building Floor Area = 3000, Lot Area = 2000, the calculated result is 1.5.
Sample result: Calculating…
Frequently asked questions
What does the Floor Area Ratio (FAR) calculate?
Floor Area Ratio (FAR) Calculator The Floor Area Ratio Calculator divides total building floor area by the lot area to give the FAR, a key zoning metric. Enter the total floor area and lot area. — free online calculator.
Which values should I enter?
Enter Total Building Floor Area, Lot Area using the units and format shown beside each field.
What formula does this calculator use?
The calculator uses the following relationship: FAR = Total Building Floor Area ÷ Lot Area.
Why might my result differ from another source?
Results can differ when another source uses different units, rounding rules, conventions or assumptions. Compare the inputs and definitions before comparing results.
Does the result update automatically?
Yes. Changing an input updates the result using the same calculation engine shown on this page.