Measure to the centerline of interior partitions of a space.

Total Net Area is calculated by adding together all programmed areas.

Labs, Courtrooms, Secure Evidence Storage, etc.

A Circulation Multiplier is applied to the Net Area to estimate the amount of Circulation Area that should be included in the Usable Area.

## What is a circulation area?

Circulation area is the floor area of verandah, passages, staircase, balconies etc. which are used for movement of persons using the building. The circulation area of any floor comprises of the following: Verandah. Balconies. Passages and corridors.

## How do you calculate building occupancy?

To estimate the occupancy of a space, divide the square footage of the room by the square footage required per person. This square footage per person varies significantly depending on the type of building, and can be found in Section 1004 of the International Fire Code.

## How do you calculate gross area?

Multiply the length and width measurements in order to find the square footage. Multiply the square footage times the number of floors in the building. Subtract the square footage of any elevator shafts, lobbies (other than on the first floor), or rooms that house only equipment used for the building’s operation.

## How is floor area ratio calculated?

Floor area ratio (FAR) is the measurement of a building’s floor area in relation to the size of the lot/parcel that the building is located on. FAR is expressed as a decimal number, and is derived by dividing the total area of the building by the total area of the parcel (building area ÷ lot area).