HOW TO MEASURE THE SQUARE
FOOTAGE
OF YOUR WALLS ACCURATELY
KEY: Measure the Gross Square
Footage. Then deduct for doors, windows, mirrors, fireplaces,
etc. to calculate the Net Square Footage.
FORMULA (In inches): Perimeter
x Height ÷ 144 = Square Footage.
In our example the room is 14'3" X 15'1"
with a wall height of 7'9" (top of base board to bottom of
picture rail).
704 x 93 ÷ 144 = Gross sq ft.
65,472 ÷ 144 = Gross sq ft.
454.66 = Gross sq ft
Now figure your deductions using the formula...
A window 6' X 4'
Two doors 2'7½" X 6'8"
A book case 11'1" X 7'3"
A vent 1'3" X 9"
Using the key above, calculate the Net Square Footage...
+454.66 __Gross
sq ft.
-024.00 __-window sq ft.
-035.00 __-two doors sq ft.
-080.35 __-book case sq ft.
-000.93__--vent sq ft.
------------
+314.38__-Net
sq ft. __Round this number up to 315
sq ft.
Always order the exact amount of Stoney Brook Paper
you need.
If you understand this example, you can accurately
calculate the sq ft of a room with many deductions. Just take your
time and write it all down on a sheet of paper. Use a calculator
to double check your math. Take accurate measurements and don't
rush.
