When starting repairs, you need to have a good idea of the amount of work to buy the right amount of materials or check the estimates of the hired builders. We offer an article on how to properly measure the area of a room.
Necessary tools
Today, every professional is equipped with modern handheld computers, which include ultrasonic roulette. With its help, it is easy to calculate not only the area, but also the volume with the perimeter of any room. If you want, by installing the application, you can turn any "Android" device into a planimeter (instrument for measuring). If you use traditional roulette, a plumb line should be used for accurate height measurement.
How to measure the area of a room with uneven walls? This should be done in two places - the narrowest and widest, taking average indicators as a basis. For example, the height of the wall is: 2.54 m and 2.60 m. The average figure will be 2.57 meters (2.54 + 2.60): 2.
Calculation formula for a rectangular room
The easiest way to calculate the area of a room is a standard rectangular shape. To do this, make two measurements: the length and width of the floor. Having liberated the territory from bulky objects, it is advisable to dismantle skirting boards for more accurate indicators. Results should be expressed in square meters.
The area of the room is determined by the formula: S = a * b, where a and b are the measured length and width. If a = 4.75 m, and b = 3.20 m, then S = 15.2 sq. m. Dimensions will allow you to purchase wallpaper for the ceiling.
How to measure the area of the room for wallpapering? To do this, you need to know the perimeter: P = (a + b) * 2 and the height of the walls ( h ). S = P * h. If h = 2.5 m , then for our example S = 39.75 sq. m. The second step is to subtract the area of sites that do not require a primer and wallpapering. Most often these are windows and doors. For example, the window area is 1.94 square meters. m, and the doors - 1.18 square meters. m. Then you need to buy supplies for an area of 36.63 square meters. m
Non-standard room
With the unusual shape of the room, it should be divided into the possible number of rectangles, adding up the area of each. If in addition to the rectangles other geometric shapes are highlighted, the calculation is done according to the formulas proposed below.
How to measure the area of a room in square meters, if it has the shape of a circle? You should use the formula: S = Pi * r², where r is the radius of the circle. For example, it is equal to 1.5 m, then S = 7.07 square meters. m. The number Pi can be taken with an accuracy of three digits - 3.14.
If the room has the shape of a triangle, it is most convenient to use the Heron formula, which is presented in the picture above. To calculate the area, you should know the dimensions of all three sides and find the half-perimeter. If a = 1.8 m, b = 2.3 m, c = 1.9 m, the half-meter will be 3 meters. Substituting the size in the formula, you can get the result.
Walls with niches and ledges
Ventilation structures, overhangs and niches should be considered when calculating in order to acquire the right amount of materials. How to measure the area of a room, if any? The area of a separate plot should be calculated additionally to either add to or subtract from the final result. If there is a niche in the wall that requires wallpapering, its dimensions should complement the total area. If it is supposed to repair a ceiling with a protrusion, its value should be taken from the final result.
Nevertheless, professionals advise buying materials not strictly according to calculation, but adding 5% for unforeseen expenses. During the work it is not always possible to pick up what was bought in advance. The color of the wallpaper from the new batch may differ, or the desired colors may be completely out of stock.
Number of wallpapers
Answering the question of how to measure the area of a room, it is impossible to circumvent the problem of the number of wallpapers required for repairs. They are sold in rolls of different widths, without a pattern and with complex colors that require fitting. Consider both options:
- Wallpaper without the need for selection of a picture is calculated strictly by area. For example, rolls with a width of 0.53 m and a length of 10 meters are selected. The area of each roll is 5.3 square meters. m. For the wall area of 36.63 sq.m, 7 rolls will be required (36.63 m: 5.3 m = 6.9). It is currently fashionable to use two colors or two different textures for wallpaper. Then you should consider the number of not only rolls, but also strips. With a ceiling height of 2.5 meters, 4 strips will come out of each roll. Having determined their sequence, you should decide which color wallpaper will be purchased in three, and which - in four rolls. Perhaps their number will be increased due to the need for color combination.
- Solving the problem of how to measure the area of a room, you should determine the areas where you can put into the business the remaining pieces of wallpaper. For example, behind a built-in wardrobe. This is due to the fact that due to the displacement of the canvas of 15-30 cm there will be wallpaper, which will not be possible to use in open spaces. If there are no hidden areas, then the number of rolls will increase. With an offset of 0.3 m, the length of the used part of the ten-meter roll will be 8.8 meters, and this should be taken into account. The usable area is not 5.3, but 4.66 square meters. m. For our example (36.63 m: 4.66 m = 7.86), not 7, but 8 rolls will be required.
The above calculations convincingly prove that, given the cost of materials, it is impossible to start repairs without measuring the area, relying on approximate figures.