Plot Ratio Calculator

Calculate plot ratio (FAR), site coverage and maximum GIA from your site area. Check against planning limits.

Site Information

Site area

Number of storeys

Building footprint

m²

Planning plot ratio limit

Leave blank if no limit set

Results

Enter dimensions

Plot ratio

—

FAR

GIA

—

m²

Site coverage

—

Open space

—

m²

Max GIA at limit —

Remaining capacity —

Site area —

Plot Ratio Gauge

01.02.03.0+

Typical Plot Ratios

Suburban residential 0.3–0.6

Urban residential 0.8–2.0

City centre mixed-use 2.0–5.0

Business park / office 0.4–1.0

Town centre retail 1.0–3.0

Industrial / logistics 0.3–0.6

Hong Kong (central) up to 15

Singapore CBD up to 14

Plot Ratio vs FAR

Plot Ratio (UK) and Floor Area Ratio (FAR, USA) are the same metric: total GIA ÷ site area. A ratio of 2.0 means you can build 2× the site area across all floors.