How to calculate the area of a room - formulas and calculation methods
When undertaking repairs, you must purchase a sufficient amount of wallpaper, glue, paint and other materials. To do this, you need to know how to calculate the area of a room. If you understand how to obtain and apply the necessary measurements, then in the future, for example, when buying or selling real estate, you can independently calculate the area of the premises and check the documents.
Simple rectangular or square room
In order to learn how to calculate the floor area of a room, you must determine its shape. In the room, which is a rectangle or square, you need to measure the length and width and multiply the values between each other. You will get the area of the room in square meters.
The formula by which you can calculate the area:
S rooms = A x B, where A is the length, B is the width.
For measurement, you can take an ordinary roulette. To get the most accurate result, it is recommended to measure the length at the beginning of the wall and at the end and, if the numbers differ, take the arithmetic average.
A room with niches or ledges
If the room has niches, ledges, plumbing or ventilation structures, it is necessary to measure separately the area of each site. If this is a niche in the wall, then the area of the recess should be added to the area of the room. If this is a ledge, then, accordingly, its area will need to be subtracted from the area of the room.
The same principle must be followed if you want to learn how to calculate the ceiling area of a room. A flat, rectangular ceiling without any niches and protrusions means that it must be measured in length and width, and then calculate the area by simple multiplication.
If you plan to insulate the floor using heating elements, then from the total floor area you will need to subtract the area occupied by heavy furniture.
Complex configuration room
Often there are rooms of an unusual shape. If possible, then you need to divide the room into several rectangles, calculate the area of each and add.
The area of the room in the shape of a circle is calculated by the formula:
S rooms = πR², where R is the radius. You must consider how many degrees in the sector.
To calculate the area of a triangular-shaped room, the Heron formula is used:
S rooms = √ (P (P-A) x (P - B) x (P - C)), where P is half the perimeter of the triangle, A, B, C are the lengths of its sides.
The half-perimeter of a triangle is calculated as follows: P = (A + B + C) / 2
A room with a complicated wall configuration. Photo - welovead.com
Features of calculating the area of simple walls and walls containing ledges and niches
Now let's look at such an important point, as the calculation of the area of the walls of the room. Knowing exactly this value, you can buy the right amount of wallpaper for repair. Of course, you can contact a consultant in a hardware store, and he will certainly tell you how to calculate the area of walls. This is nothing complicated: measure the length, width and height of the room. Next, the wall area is calculated by the formula:
S wall = P x C, where P is the perimeter of the room, C is the height of the walls.
The perimeter of the room is calculated by the formula:
P = (A + B) x 2, where A is the length, B is the width.
To obtain more accurate results, the area of door and window openings must be subtracted from the total wall area.
The wall area of the room with protrusions or indentations will differ from the wall area of a simple room. Do not forget to add the wall area of the protruding or indented area to the main value.
Be careful when making measurements and calculations. If you use laser roulette, then make sure that the beam is directed strictly perpendicular to the wall, otherwise you will get a big error in the results.
Walls of the room with ledges. Photo - gohawaii.about.com
