FSI & Built-up Area
Calculator
Select a city to get its FSI limits, setbacks and buildable area in one click. Pune, Bengaluru, Hyderabad, Nagpur, Ahmedabad-Gandhinagar, Vadodara and Surat are live now, with more cities coming soon.
What this calculator does
The FSI & Built-up Area Calculator works out what you are allowed to build on a plot: the built-up area, the FSI or FAR it works to, how many floors fit, the ground floor footprint, the setbacks on each side and the permissible height. It reads the building rules of the city the plot is in — not a national average — so the answer is the one your sanctioning authority works to.
Live for Pune, Bengaluru, Hyderabad, Nagpur, Ahmedabad-Gandhinagar, Vadodara and Surat, each on its own regulation. Pick a city, enter the plot width, depth and the road it faces, and the result appears as you type.
Calculators by city
- FSI & Built-up Area Calculator Pune — PMC / PMRDA / PCMC · UDCPR 2020
- FSI & Built-up Area Calculator Bengaluru — BDA / BMRDA outer LPAs / BMICAPA · RMP 2015
- FSI & Built-up Area Calculator Hyderabad — HMDA · GO 168 / 145 / 16 / 95
- FSI & Built-up Area Calculator Nagpur — NMC / NMRDA · UDCPR 2020
- FSI & Built-up Area Calculator Ahmedabad-Gandhinagar — AMC / AUDA · GMC · GUDA · CGDCR 2017
- FSI & Built-up Area Calculator Vadodara — VMC / VUDA · CGDCR 2017
- FSI & Built-up Area Calculator Surat — SMC / SUDA · CGDCR 2017
Coming next: Chennai, Jaipur, Mysuru, Visakhapatnam, Coimbatore.
FSI, FAR and built-up area
FSI (Floor Space Index) and FAR (Floor Area Ratio) are the same ratio under two names: permissible floor area divided by plot area. Built-up area is what that ratio comes to on your plot in square feet. A plot with FSI 1.5 and 2,000 sft of area carries 3,000 sft of built-up area — provided the building still fits inside the setbacks, which on smaller plots is the real constraint.
Why the rules differ by city
Each state and authority writes its own development control regulation. Pune builds under UDCPR 2020, Bengaluru under BDA's RMP 2015 tables, and Hyderabad under HMDA's GO 168 — which prescribes no FSI at all and works through setbacks and height instead. A single FSI number would be wrong in at least two of those three cities, so each has its own page and its own engine here.
How to use it
Choose the city, then enter the road width and the plot's width and depth. Pick the planning authority and land use where the city has them, and switch on the loadings that apply to your plot — Premium FSI or FAR, TDR, a TOD corridor, a stilt floor, a corner plot or a notified building line. The result updates with each change, and can be saved, shared as a link or downloaded as a PDF report.
FSI and FAR questions
What is FSI?
- FSI, or Floor Space Index, is the permissible floor area of a building divided by the area of the plot it stands on. An FSI of 1.5 on a 2,000 sft plot permits 3,000 sft of built-up area across all floors.
Is FAR the same as FSI?
- Yes — Floor Area Ratio and Floor Space Index are the same ratio. Which word is used is a matter of local regulation: BDA in Bengaluru says FAR, Pune's UDCPR says FSI.
What is built-up area?
- The total floor area of the building across all floors, which is what the FSI entitlement is measured in. It is not the same as the ground floor footprint — that is one floor of it — and not the same as carpet area, which excludes walls and common space.
Which cities are live?
- Pune, Bengaluru, Hyderabad, Nagpur, Ahmedabad-Gandhinagar, Vadodara and Surat are live, each running its own city's building rules. Chennai, Jaipur, Mysuru, Visakhapatnam, Coimbatore are next.
Is this FSI calculator free?
- Yes. The calculation runs in your browser, needs no login, and the result appears as you type.
Are the results approved for building permission?
- No. The figures are indicative and meant for site evaluation and feasibility — the sanctioning authority's own scrutiny governs. Each city page names the regulation and the orders its numbers come from so they can be checked.