What is a typical FAR in cities?

Low-density residential zoning typically has FAR 0.3–0.7; mid-density 1.0–2.5; commercial downtown cores may allow FAR 10–20 or higher. Tokyo's central wards can reach FAR 40+ for high-rise towers.

How does FAR differ from site coverage?

FAR measures total floor area relative to land — a 10-storey building covering 10% of a site has FAR 1.0. Site coverage (lot coverage ratio) only measures the building's footprint, ignoring how many floors there are.

Floor Area Ratio (FAR) Calculator

Calculate Floor Area Ratio (FAR), also called Floor Space Index (FSI) or plot ratio. FAR = gross floor area / total land area. Used in urban planning zoning regulations worldwide to control building density.

Data set — comma or newline separated

Statistical Results — n = 8

Count (n)8

Sum (Σx)40

Min2

Max9

Range7

Q14

Q35.5

IQR1.5

Mean (μ)5

Median4.5

Mode4

Pop. Variance (σ²)4

Pop. Std Dev (σ)2

Sample Variance (s²)4.571428571

Sample Std Dev (s)2.138089935

Skewness0.65625

Excess Kurtosis-0.21875

How to Use

Enter the values for the scenario you are assessing. Calculate Floor Area Ratio (FAR), also called Floor Space Index (FSI) or plot ratio. FAR = gross floor area / total land area. Used in urban planning zoning regulations worldwide to control building density. Use the floor area ratio result to inform your calculation.

Floor Area Ratio (FAR) Calculator

How to Use

Frequently Asked Questions

What is a typical FAR in cities?

How does FAR differ from site coverage?