What is the method used to calculate the total square footage of a building?

The method used to calculate the total square footage of a building involves measuring the length and width of each room and summing their areas. This approach provides an accurate assessment of the usable floor space within the building. Each room's area is calculated by multiplying its length by its width. After determining the areas of all individual rooms, these values are added together to obtain the total square footage.

This method is straightforward and reliable because it directly addresses the dimensions that contribute to the floor area. It allows for a precise calculation that reflects the actual space available for use, which is critical for various applications, such as determining heating and cooling requirements, flooring needs, and real estate valuations. Other methods mentioned do not directly relate to square footage calculation: counting floors does not provide dimensions of individual spaces, measuring wall height calculates volume rather than area, and volume calculations are focused on three-dimensional space, which is not relevant when assessing square footage.