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Plot Ratio Calculator

Formula

The formula to calculate the Plot Ratio (PR) is:

$PR = \frac{TFA}{SA}$

Where:

$PR$ is the plot ratio
$TFA$ is the total floor area of the building (square feet)
$SA$ is the site area (square feet)

What is a Plot Ratio?

Plot ratio, also known as floor area ratio (FAR), is a key determinant in urban planning that helps to control the density of buildings in a given area. It is the ratio of a building’s total floor area to the size of the piece of land upon which it is built. This ratio is used by planners to ensure a balance between the built environment and open space, and to manage the intensity of land use in urban areas.

Example Calculation

Let's assume the following values:

Total Floor Area (TFA) = 5000 square feet
Site Area (SA) = 2000 square feet

Using the formula to calculate the Plot Ratio (PR):

$PR = \frac{TFA}{SA} = \frac{5000}{2000} = 2.5$

The Plot Ratio (PR) is 2.5.