Free tool
FSI / FAR buildable area calculator
See how much you can build on a plot from the floor area ratio and ground coverage allowed in your zone.
How it works
Buildable area is your plot area multiplied by the floor area ratio (FAR or FSI) allowed for your plot. Ground coverage limits the footprint per floor. FAR depends on zone and road width, so confirm the limits with a licensed architect or the local bye-laws.