The area of doors and windows are ignored.
Area of wall of a room formula.
If the perimeter is 40 feet and the height is 10 feet multiply 40 times 10 feet to get a wall area of 400 square feet.
Multiply the perimeter of the room by the ceiling height to get the wall area.
Next use the same formula to record the individual area of windows and doors.
You will need this measurement when estimating the amount of tile mortar grout and sealer that you will use for your project.
Its area bh observe the opposite walls being of the same size and shape have the same area too.
Length x width area.
Because most walls are square or rectangular you can determine their surface area by multiplying the width and height measurements and then subtracting any door or window space.
For the rectangle cdhg the lengths of two adjacent sides are l and h.
So if your room measures 11 feet wide x 15 feet long your total area will be 165 square feet.
Its area lh for the rectangle daeh the lengths of two adjacent sides are b and h.
Simplify your math by rounding inches to feet unless absolutely necessary.
The formula to find the area of the walls of a rectangular room is a 2h l b h is wall height l is room length and b is room breadth.
Sketch the surface area to be measured and record the measurements and results as you go.