| Square foot is measured by multiplying the length by the width of a room, a building, the yard, etc. any flat space.
If say a rectangle single family home, one story, with a basement, attached garage, and one small finished room, say a den, in the basement. The livable areas are the first floor and the den in the basement.
Measure the den inside from wall to wall, 20 ft lenght and the width, 15 ft.
A=LW
A=20 x 15
A=300 sq ft.
For the firsrt floor, just measure the outside, side to side 60 ft and front to back, 25 ft.
A=LW
A=60 x 25
A=1500 sq ft.
Total sq ft of living space is 1500 + 300 = 1800 sq ft.
If the building is odd shaped, break it down into small rectangles, add the products of each, and all the products for the total. |