Floor Area Ratio (FAR) Calculator
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.
Floor Area Ratio (FAR) Calculator gives you a faster way to work through practical calculation scenarios without rebuilding the same calculation from scratch every time. Start with Lot Area, Building Footprint Area (Ground Floor), and Number of Floors and use the live outputs to estimate Total Building Area and Floor Area Ratio (FAR) in one pass. This page is built to help you compare scenarios quickly, validate rough assumptions, and move into a related calculator when you need a second angle on the same problem.
Use The Calculator In A Few Steps
Work through the inputs deliberately, then compare outputs instead of relying on a single scenario.
Scenario Checks
Use these examples to verify the behavior of the calculator before you run your own values.
What Users Usually Need Next
Keep the calculator open while you skim these answers so you can test the scenario that matters.
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