# What is FAR (floor area ratio) or FSI?

Source: https://cloudbrain.in/glossary/floor-area-ratio
Last updated: 2026-11-10

FAR (floor area ratio), also called FSI (floor space index) in many Indian cities, is the total built-up floor area permitted on a plot divided by the plot area. FAR limits set by local building bye-laws decide how much can be built on a site, so it drives feasibility and design.

## Why does FAR (floor area ratio) or FSI matter for architects, engineers and contractors in India?

FAR limits set by local building bye-laws decide how much can be built on a site, so it drives feasibility and design. Rules on what counts towards FAR vary between authorities, so checks must follow the applicable bye-laws.

## What is an example of FAR (floor area ratio) or FSI?

On a 500 m² plot with a permitted FAR of 2.0, up to 1,000 m² of countable floor area can be built.

## Where does CloudBrain come in?

Our [workflow automation](/services/workflow-automation) service helps architecture, engineering and construction firms put this into practice. See the related terms below, or browse the full [AEC × AI glossary](/glossary).