FAR Calculator
Calculate the maximum buildable floor area from plot area and permissible FAR.
About this calculator
Before buying a plot or planning a development, knowing how much total floor area you're legally allowed to build matters more than the plot's raw size alone, since local zoning regulations cap that figure through a Floor Area Ratio that varies by zone, road width and building type. This calculator multiplies your plot's area by the permissible FAR set by local development regulations to estimate the maximum total buildable floor area across all floors combined, not just the ground floor footprint. Enter plot area and the FAR your municipality permits for that zone, and get the ceiling on total constructible area immediately rather than looking up the FAR and multiplying it manually. Because FAR limits vary by city, zone classification and sometimes by road width or plot size tier, always confirm the exact permissible FAR for your specific plot with the local development authority before using this figure for actual project planning.
Worked example
2,400 sqft plot with FAR 1.5
Result: Max buildable area = 3,600 sqft
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