Use this free FAR calculator India (also called FSI calculator) to estimate how much built-up area you can construct on your plot from Floor Area Ratio or Floor Space Index. It is for planning and education only — municipal rules vary by city, zone, and road width.
How to use this FAR / FSI calculator
- Enter your plot area in sq ft or sq m (as on your sale deed or site plan).
- Enter the FAR or FSI allowed for your zone (from your municipal notification, architect, or development plan).
- Optionally add ground coverage % and number of floors for footprint and per-floor hints.
- Click Calculate to see permissible built-up area in sq ft and sq m.
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What is FAR and FSI in India?
FAR (Floor Area Ratio) and FSI (Floor Space Index) mean the same thing in Indian building regulations: total permissible built-up area divided by plot area. If FAR is 1.5 on a 2,000 sq ft plot, you may build up to 3,000 sq ft across all floors — before setbacks, coverage caps, height limits, parking, and stilt rules are applied.
Each city sets FAR through its development authority — for example DDA in Delhi, BMC/MCGM in Mumbai, BBMP/BDA in Bengaluru, HMDA in Hyderabad, and PMC in Pune. Values differ by zone (residential, commercial, TOD corridors) and may increase with road width or TDR (Transferable Development Rights).
FSI calculator Mumbai — indicative bands (DCPR 2034)
If you searched for FSI calculator Mumbai, you are usually checking how much you can build on a suburban or island-city plot under MCGM/BMC rules. This tool accepts any FAR or FSI value — use the band below as a conversation starter with your architect, then enter the number your ward office or DP remark confirms.
| Mumbai context | Indicative base FSI | Homeowner note |
|---|---|---|
| Suburbs — residential | ~1.33 | Premium FSI may apply by road width — not auto-calculated here |
| Island city — residential | ~1.33 | Lower premium cap than suburbs |
| With premium / TDR / redevelopment | Higher (project-specific) | Always verify on sanctioned drawings — educational bands only |
Example: 1,000 sq ft plot × FSI 1.33 ≈ 1,330 sq ft permissible built-up area before setbacks, stilt parking rules, and height caps. Enter your plot and FSI in the calculator above.
FSI and FAR mean the same thing in India. After you know built-up area, use our construction cost calculator for a rough budget band.
FSI calculator Delhi — indicative bands (MPD 2021)
If you searched for far calculator Delhi or FSI calculator Delhi NCR, you are usually checking permissible built-up area under the Delhi Master Plan 2021 (DDA). This tool accepts any FAR or FSI your architect or sanction letter states — use the bands below only as an educational starting point.
| Delhi context (MPD 2021) | Indicative base FSI | Homeowner note |
|---|---|---|
| Low-density residential (LDR) | ~1.2 | Plotted / low-rise — verify land-use zone on DDA maps |
| Medium-density residential | ~2.0 | Common for group-housing discussions — not auto-calculated here |
| High-density / TOD corridors | ~2.5–3.5 | Project-specific; always check sanctioned drawings |
| Lutyens / special zones | Varies widely | Do not rely on generic bands — consult DDA / architect |
Example: 200 sq yd plot (~1,800 sq ft) × FSI 2.0 ≈ 3,600 sq ft permissible built-up before setbacks and parking rules. Enter your plot size and confirmed FSI in the calculator above.
After built-up area, estimate budget with our construction cost calculator (Delhi NCR ₹/sq ft bands included).
FSI calculator Bengaluru — indicative bands (BDA / BMRDA)
If you searched for floor area ratio calculator Bangalore or FSI calculator Bengaluru, you are checking permissible built-up area under BDA (Bruhat Bengaluru Mahanagara Palike) or BMRDA rules. This tool accepts any FAR or FSI value — use the bands below as an educational reference, then enter the figure your architect or BDA sanction letter confirms.
| Bengaluru context (BDA / BBMP) | Indicative base FSI | Homeowner note |
|---|---|---|
| Plotted residential (most layouts) | ~1.75–2.25 | Varies by road width — check BDA DP remark or BBMP zone |
| Apartment / group housing | Higher (project-specific) | TDR, FAR incentives, and additional FSI may apply — verify on sanctioned drawings |
| BMRDA peripheral areas | Varies by zone | Confirm with BMRDA or local planning authority — educational bands only |
Example: 1,200 sq ft plot × FSI 2.0 ≈ 2,400 sq ft permissible built-up before setbacks and parking requirements. Enter your plot size and confirmed FSI in the calculator above.
After built-up area, estimate your renovation or build budget with our construction cost calculator (Bengaluru / Karnataka ₹/sq ft bands included).
What is FAR calculation?
FAR calculation (or FSI calculation) divides permissible built-up area by plot area. Formula: FAR = Built-up area ÷ Plot area. Example: FAR 1.5 on a 1,000 sq ft plot → permissible built-up ≈ 1,500 sq ft before setbacks and parking deductions. Confirm your sanctioned FAR with your architect or local planning authority before construction.
FAR vs ground coverage
Ground coverage is the maximum percentage of the plot that the building footprint can cover at ground level. It is separate from FAR. A plot can have FAR 2.0 but only 40% ground coverage — meaning more floors with a smaller footprint. Always check both numbers in your local bye-laws.
When to consult an architect
This tool does not replace sanctioned drawings, structural design, or municipal approval. Before buying land or starting construction, verify FAR, setbacks, height, parking, and fire norms with your local development authority and a licensed architect. For construction cost estimates after you know built-up area, see our Tools hub (construction cost calculator).
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Disclaimer: Educational estimate only. Speak Arch is an online-only publication. Contact: contact@speakarch.com.
Last updated: 14 June 2026