How To Calculate The Floor Area Ratio

Divide the total square footage of the building s stories by the square footage of the site to calculate floor area ratio.

How to calculate the floor area ratio.

F l o o r a r e a r. You may determine the ratio by dividing the total or gross floor area of the building by the gross area of the lot. The floor area ratio is calculated by taking the square footage of a building and dividing it by the square footage of the property that the building sits on. Floor area ratio far g b.

Far limits urban density but also indirectly controls a building s maximum occupancy without regulating the structure s shape. The result is the floor area ratio far. In our example this is 250 m gross floor area 125 m constructed land 2 story propers. Fsi floor space index definition formula uses example far floor area ratio engineering tactics duration.

The property area is multiplied by the far factor. With the result being the maximum floor area allowed for a building on the lot. Local governments use the floor area ratio for zoning codes. Divide the gross floor area by the buildable land area.

The floor area ratio calculation is the following. Far gross floor area plot area. Floor area ratio total covered area on all floors of all buildings on a certain plot area of the plot or. Gross floor area g floor area of 1st story floor area of 2nd story for all floors above the ground step 4.

Far gross floor area area of the plot far is used for developing the zoning codes by the government s planning department. Of course the numerator and denominator must use the same units such as square feet sf. Calculate the floor area ratio. This value must not exceed the number of possible story propers in the land use plan.

The floor area ratio is useful to local governments in showing the density of a property or area for zoning decisions. How to calculate floor area ratio. In the example 17 000 square feet divided by 10 000 square feet equals a ratio of 1 7. Floor area ratio far is a mathematical formula that determines how many square feet can be developed on a property in proportion to the lot area.

Engineering tactics 6 896 views. The formula of far total area of floor area of land after deduction space for the road. Calculation of the number of floors.