FAR / FSI Calculator
Buildable area from plot size and the sanctioned Floor Space Index.
FSI counts BUILT area, not footprint — balconies, stairs and sometimes parking have exemption rules that swing project economics. Stilt+premium FSI math decides what your plot is really worth.
Formula
FAR / FSI Calculator is a free fsi calculator for surveyors, civil engineers and property buyers — instant, accurate and 100% client-side, with the governing formula and reference shown next to the result so the number can be defended, not just quoted.
About FAR / FSI Calculator
Buildable area from plot size and the sanctioned Floor Space Index. The calculation implements buildable = plot × FSI; floors = buildable/plate (Local development control regulations (DCR)). FSI counts BUILT area, not footprint — balconies, stairs and sometimes parking have exemption rules that swing project economics. Stilt+premium FSI math decides what your plot is really worth.
How to use FAR / FSI Calculator
- 1Enter Plot area in m².
- 2Enter Permissible FSI/FAR (Indian cities: 1–4 typical; premium FSI purchasable in many).
- 3Enter Typical floor plate in m².
- 4Read Total buildable area, Floors achievable instantly — no submit button needed.
- 5Need US units? Flip the SI/Imperial toggle and every field converts.
Why use FAR / FSI Calculator?
- ✓Implements the standard formula — buildable = plot × FSI; floors = buildable/plate
- ✓Reference cited on-page: Local development control regulations (DCR)
- ✓One-click SI ⇄ Imperial toggle — values convert in place, physics stays in SI
- ✓Live worked example: the substitution recomputes from your numbers
- ✓Runs entirely in your browser — nothing uploaded, free forever
Frequently asked questions
What formula does the FAR / FSI Calculator use?+
It computes buildable = plot × FSI; floors = buildable/plate, per Local development control regulations (DCR). The formula is displayed under the result along with a worked example substituted with your own inputs.
What should I keep in mind when using this calculator?+
FSI counts BUILT area, not footprint — balconies, stairs and sometimes parking have exemption rules that swing project economics. Stilt+premium FSI math decides what your plot is really worth.
Are regional land units exact?+
Conversion factors follow state revenue-department values noted on the tool. Units like bigha and katha vary by region, so always confirm the local factor named in your land records.
Is the FAR / FSI Calculator free to use?+
Yes — completely free, no sign-up, no limits. It runs client-side in your browser, so inputs stay private and results are instant even on slow connections.
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