It is easy to check the work of builders, determine the amount of work and materials, knowing how to calculate the square meters of the floor or walls of a room using simple geometric formulas, simple calculations and simple tricks.

called a square meter area unit, adopted in the international system of units, SI. 1m² is equal to the area of ​​a square with a side of 1m.

Knowledge simple rules and several geometric formulas for calculating the number of square meters of walls, floors, ceilings will allow you to avoid errors in calculations and correctly determine the required values.

Counting tools

For measurement and calculation, you will need the following objects and tools:

• measuring tape, the required tape measure length is 3-5 m;
• pencil;
• sheet of paper for notes;
• calculator;
• construction corner.

Square mark perpendiculars - lines intersecting at right angles.

Room area

Knowing the footage of the room is useful to determine the cost of flooring, ceiling finishes, the number and power of lighting fixtures. Measuring the quadrature of the room, check the conformity of the area declared for the project.

It is more convenient to measure walls from below, at the level of the plinth. Doubts about the correct form of the room are eliminated by measuring the diagonals. If the diagonals of the room are equal, then the corners are right, and the room is rectangular.

Square or rectangle

The most common form of a room in terms of - square or rectangular. Calculating the square on the floor in this case will not be difficult:

• measure the length and width of the room with a tape measure;
• multiply the numbers among themselves, writing the result on paper;
• protrusions, columns are measured, the area of ​​\u200b\u200belements is calculated according to the same principles, multiplying two sizes;
• the resulting numbers are subtracted from the area of ​​​​the room.

At the same time, the area of ​​\u200b\u200bthe ceiling is calculated according to the same principle, that is, the length is multiplied by the width minus technological openings, if any.

By counting the square meters of the premises and adding them up, you can find out the area of ​​\u200b\u200bthe entire house.

Irregular room

Bay windows, attics and rooms of houses with complex architecture in terms of often irregular in shape. The footage of a non-standard room with semicircles, ledges, and many corners is more difficult to calculate. Facilitate the task by using principle of dividing complex figures into simple ones.

The floor, representing as a composite figure mentally or displaying on paper, is divided into standard geometric elements. Then calculate the area of ​​the elements one by one and add the resulting values.

L-shaped, T-shaped rooms in terms of break into rectangles and squares. Semicircular surfaces are taken as part of a circle.

The number of square meters of the floor of a room based on a trapezoid can be calculated in two ways:

• imagining a trapezoid combination of a square with two triangles. Having received the value of the figures, the numbers are added;
• on formula trapezium area.

For calculation by the formula, two opposite long walls, these dimensions will give the values ​​of the bases. The height value is determined by measuring the perpendicular drawn from one of the corners of the smaller base to the larger one.

Trapezoid area formula S=1/2(A+B)*H, where:

• S is the desired value, the area of ​​the trapezoid;
• A - the base of the trapezoid;
• B - the base of the trapezoid;
• H is the height of the trapezoid.

The area of ​​the trapezoidal room is half the amount numerical values bases multiplied by the height.

Room volume

The cubic capacity of the room, or the volume in construction, is used when calculating the required power of heating, ventilation, and air conditioning of the room.

Volume is measured in cubic meters. The unit is written as 1 m³.

From the point of view of geometry, the room as a figure is hexagon.

By measuring the length, width and height of a rectangular room, multiplying the measurements obtained, get simple room volume.

The volume of a room of a complex shape is calculated as follows:

• the floor of the room is divided into simple geometric shapes;
• calculate the quadrature of each figure;
• the resulting values ​​\u200b\u200bare added and multiplied by the height to the ceiling.

How to calculate the square of the walls?

The size of the wall in square meters is needed to calculate the quantity finishing materials, placing shelves, mirrors or wall cabinets.

solid wall

The square of the wall is calculated similarly to the floor area - length, height of the wall after measurement are multiplied between themselves. All depressions and protrusions, if any, are taken into account. The walls of attic rooms under the roof are often broken in shape, the segments are in different planes.

In this case, sections of the wall are measured separately, transferred to paper. Calculate the area of ​​each individual geometric figure and summarize the numbers.

with window

Determining the number of square meters of the wall, window openings, as a rule, exclude.

The end faces of the walls near the window are called slopes, their dimensions are also not included in the footage of the wall and are considered separately, for example, when calculating plastering works or putty.

with door

Square doorway from the wall area when calculating subtract. Slopes, if necessary, are measured separately.

We measure the area of ​​\u200b\u200ba irregular shape

When calculating the footage of decorative arched openings or lancet windows, they follow the same principle, breaking complex figure into a few simple elements.

Parts of a circle and triangles are combined with squares and rectangles.

Circle

A whole circle in the interior is quite rare. A window, columns, the central part of a multi-level ceiling can be completely round. Basically, you have to deal with parts of the circle: half or segments.

Measure with a tape measure between two opposite points of the circle. This segment will be called diameter. The radius of a circle is half the diameter.

The area of ​​a circle is calculated using the formula S = π*R², where:

• R is the radius;
• S is the area of ​​the circle;
• π is a constant mathematical value, rounded up to a value of 3.14.

The numerical value of the area of ​​the semicircle is obtained by dividing the result by 2.

The quadrature of a sector of a circle is equal to the product of half the length of the arc of the sector and the radius of the circle, calculated by the formula S=1/2L*R.

Triangle

Triangle area formula S=1/2*H*A, where:

• S is the area of ​​the triangle;
• H - height;
• A is the side of the triangle.

The height of a triangle is obtained by measuring the perpendicular from the angle opposite to the side with a tape measure.

Watch the video below for helpful tips for quickly and correctly squaring walls and floors:

Using simple formulas from a school geometry course, you can calculate any desired value for construction or repair.

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Sometimes you need to know the area or volume of a room in order to make calculations for the purchase various materials for building or renovation. During the repair process, you have to measure the area of ​​\u200b\u200bthe walls in order to determine the amount of wallpaper or other finishing materials. As a rule, calculations begin with measurements. Measurements are carried out using a tape measure or other methods.

This is not a difficult process as there are certain formulas. In this case, it is enough to determine the size. For this you need:

• purchase a tape measure, the most common, preferably 5 meters;
• take paper, pencil or pen;
• have a calculator, although it is not difficult to calculate on paper.

With the help of this, the minimum set of devices, all necessary calculations. Of course, it is better to have an assistant, but, in extreme cases, you can do everything yourself. The dimensions of the room are measured along the walls, if they are not lined with furniture. If exact dimensions are required, then better furniture set aside and release the walls. Only after that it is recommended to make all measurements. At the same time, one should take into account the fact that right rooms, with right angles practically does not exist when it comes to premises built back in Soviet times. In this regard, it is necessary to take the measurement process very seriously.

Rectangular rooms

If the room has the right (relatively) rectangular shape, without all kinds of protrusions or niches, then its area is calculated quite simply. First, you need to measure the length and width of the room, after which the results are written down on a piece of paper so as not to forget. Measurements can be made both in meters and in centimeters. If measurements are taken in meters, then a comma is placed after the integer values ​​​​of meters, and then centimeters are written. For example, 4 meters, 35 centimeters should be written: 4.35 m.

Having measured a length, for example, 2.35 m and a width of 1.4 m, the data are multiplied. For example: 2.35 m x 1.4 m. The result is 3.290 m2 or 3.29 m2. As a rule, two digits are always left after the decimal point. If there are more of them, then the value is rounded according to the rules that were set out in primary school schools. In this case, it is possible to round either to meters or to centimeters, depending on the required accuracy. In general, it is sufficient to measure to the nearest meter, and only occasionally to the nearest centimetre.

Irregular room

Not all rooms have the correct shape. Quite often there are rooms with protrusions various shapes. In such cases, the rooms are divided into separate squares, rectangles or triangles, depending on the configuration of the ledges. Then all protrusions are measured, after which their area is calculated and all the results obtained are summarized.

The photo above shows an example where the room has a rectangular ledge. In this case, the area of ​​the room is calculated as follows:

1. The total area without a ledge is calculated: 3.6m x 8.5m \u003d 30.6m 2.
2. The area of ​​​​the protrusion is calculated: 3.25m x 0.8m = 2.6m 2.
3. The results obtained add up: 30.6m 2 + 2.6m 2 = 33.2m 2.

There are rooms with sloping walls. Proceed as follows: the wall is broken so that a rectangle and a triangle are obtained (see the figure below). As a result, for calculations, it is necessary to have five sizes. Subsequently, the areas of the figures are calculated separately, and then all the results are either added or subtracted, depending on the nature of the protrusion.

The square is calculated in the following order:

1. The main rectangular part is calculated: 6.5 m x 1.4 m = 8.96 m 2. Rounding up we get 9.0 m 2.
2. The area of ​​​​a small rectangle is calculated: 2.7m x 1.9m \u003d 5.13m 2. When rounding, we get 5.0 m 2.
3. The area of ​​​​a triangle with a right angle (1.3m x 1.9m) / 2 = 1.235m 2 is calculated. Rounding will get 1 m 2.
4. In conclusion, the results obtained are added up: 9 + 5 + 1 \u003d 15 m 2.

Such accuracy of calculations is absolutely acceptable. As a rule, the layout of the premises is varied, but the calculation rule is absolutely the same: everything is divided into separate, independent figures, the area of ​​\u200b\u200bits individual figures is calculated, and then everything is added up, or maybe subtracted, depending on the configuration of the ledges. This is especially true when determining the floor or ceiling area.

How to calculate wall area

You need to know the area of ​​\u200b\u200bthe walls when it is planned to purchase finishing materials, such as wallpaper, putty, paint and others. If this is a blank wall, then everything is simple here - the height and length of the wall are measured, after which the results are multiplied. If there is a window or doorway in the wall, then you need to determine what area they occupy and subtract from the total area of ​​\u200b\u200bthe wall. So:

• measure the height of the walls and their width;
• get the height and width doorways;
• measure the height and width of window openings.

blank wall

• 2.5 m x 6.0 m \u003d 15 m 2 - the area of ​​\u200b\u200ba blank wall.

Wall with a doorway:

1. Total wall area: 2.5m x 6.0m = 15m2.
2. Doorway area: 2.1m x 1.0m \u003d 2.1m 2.
3. Wall area without doors: 15m 2 - 2.1m 2 = 12.9m 2.

Wall with a window opening:

• Total wall area: 2.5m x 4m = 10m2.
• Window opening area: 1.3m x 1.5m = 1.95m 2.
• Wall area without a window: 10 m 2 - 1.95 m 2 = 8.05 m 2.

As a rule, calculate the total area of ​​​​all walls. To do this, take and add up the results of the areas of each wall. For example: 15m 2 + 12.9m 2 + 10m 2 + 8.05m 2 = 45.95m 2.

Sometimes, for some calculations, you need to know how much space a room occupies. For such calculations, you need to know one more figure: not only the length and width, but also the height of the room. As a result of the calculations, the cubic capacity (volume) of the room is obtained, which is indicated in cubic meters. For example:

• room length - 6 m;
• room width - 4 m;
• room height - 2.5 m.

Now you need to multiply all the indicators: 6m x 4m x 2.5m \u003d 60m 3. So, it turns out that the volume of the room is 60 m 3.

Conclusion

Such accuracy of calculations does not particularly affect the final result, since few people purchase facing materials based on such calculations. As a rule, they purchase any facing materials with some margin. If, for example, count the number ceramic tiles, then the calculations are made by the number of pieces, based on the laying scheme. Even in this case, it is taken with some excess. This is also due to the fact that emergency situations associated with damage are possible. facing material. This is especially true when the work is done independently, without the involvement of professionals.

This also applies to materials such as wallpaper, linoleum, laminate, various lining, siding, etc. It must always be remembered that during the work waste appears and, moreover, there can be a lot of them, if the dimensions are arbitrary, without taking into account the use of certain materials.

This approach is especially relevant when laying linoleum, which has standard width dimensions. As for its length, then you need to measure everything very accurately and always 10 centimeters, but add. If miscalculated, it can be costly.

If you plan to make repairs yourself, then you will need to make an estimate for building and finishing materials. To do this, you will need to calculate the area of ​​\u200b\u200bthe room in which you plan to produce repair work. The main assistant in this is a specially designed formula. The area of ​​\u200b\u200bthe room, namely its calculation, will allow you to save a lot of money on building materials and direct the released financial resources in a more appropriate direction.

The geometric shape of the room

The formula for calculating the area of ​​​​a room directly depends on its shape. The most typical for domestic structures are rectangular and square rooms. However, during redevelopment, the standard form may be distorted. The rooms are:

• Rectangular.
• Square.
• Complex configuration (for example, round).
• With niches and ledges.

Each of them has its own calculation features, but, as a rule, the same formula is used. The area of ​​​​a room of any shape and size, one way or another, can be calculated.

Rectangular or square room

To calculate the area of ​​a rectangular or square room, it is enough to remember school geometry lessons. Therefore, it should not be difficult for you to determine the area of ​​\u200b\u200bthe room. The calculation formula looks like:

S rooms=A*B, where

A is the length of the room.

B is the width of the room.

To measure these values, you will need a regular tape measure. To get the most accurate calculations, it is worth measuring the wall on both sides. If the values ​​do not converge, take the average of the resulting data as a basis. But remember that any calculations have their own errors, so the material should be purchased with a margin.

A room with a complex configuration

If your room does not fall under the definition of "typical", i.e. has the shape of a circle, triangle, polygon, then you may need a different formula for calculations. You can try to conditionally divide the area of ​​\u200b\u200bthe room with such a characteristic into rectangular elements and make calculations in the standard way. If this is not possible for you, then use the following methods:

• The formula for finding the area of ​​a circle:

S room \u003d π * R 2, where

R is the radius of the room.

• The formula for finding the area of ​​a triangle is:

S room = √ (P (P - A) x (P - B) x (P - C)), where

P is the half-perimeter of the triangle.

A, B, C are the lengths of its sides.

Hence P \u003d A + B + C / 2

If in the process of calculating you have any difficulties, then it is better not to torture yourself and turn to professionals.

Room area with ledges and niches

Often the walls are decorated decorative elements in the form of various niches or ledges. Also, their presence may be due to the need to hide some unaesthetic elements of your room. The presence of ledges or niches on your wall means that the calculation should be carried out in stages. Those. first, the area of ​​\u200b\u200ba flat section of the wall is found, and then the area of ​​\u200b\u200ba niche or ledge is added to it.

The area of ​​the wall is found by the formula:

S walls \u003d P x C, where

P - perimeter

C - height

You also need to consider the presence of windows and doors. Their area must be subtracted from the resulting value.

Room with multi-level ceiling

A multi-level ceiling does not complicate the calculations as much as it seems at first glance. If he has simple design, then it is possible to make calculations on the principle of finding the area of ​​\u200b\u200bwalls complicated by niches and ledges.

However, if the design of your ceiling has arcuate and wavy elements, then it is more appropriate to determine its area using the floor area. For this you need:

1. Find the dimensions of all straight sections of the walls.
2. Find the floor area.
3. Multiply the length and height of the vertical sections.
4. Sum the resulting value with the floor area.

Step-by-step instructions for determining the total

floor space

1. Free the room from unnecessary things. In the process of measuring, you will need free access to all areas of your room, so you need to get rid of everything that can interfere with this.
2. Visually divide the room into sections of the correct and irregular shape. If your room has a strictly square or rectangular shape, then this step can be skipped.
3. Make an arbitrary layout of the room. This drawing is needed so that all the data is always at your fingertips. Also, it will not give you the opportunity to get confused in numerous measurements.
4. Measurements must be taken several times. This is important rule to avoid errors in calculations. Also if you are using make sure the beam lies flat on the wall surface.
5. Find the total area of ​​the room. The formula for the total area of ​​a room is to find the sum of all the areas of the individual sections of the room. Those. S total = S walls + S floors + S ceilings

The area of ​​​​premises (floors, walls, ceilings) is not idle information at all. It is necessary for the preparation of cadastral housing plans, redevelopment and repair. Very often it is required to calculate the amount of building material - parquet, laminate, wallpaper, drywall, tiles, etc. In multi-apartment buildings of standard projects, the area of ​​\u200b\u200ball rooms is a well-known figure. Therefore, if there is a technical documentation of housing at home, you will surely find an explication with a diagram of your home, from where you can simply rewrite all the necessary numbers. But if there are no documents, they are with the owner, and the housing is rented by or? Nothing wrong with that. For most, such a question as how to measure the area will not cause any difficulty. If you ask it, then most likely you did not go to school at all.

How to calculate the area of ​​​​a room - a task for first graders

What could be easier than calculating the area of ​​a rectangle? After all, this is the first and simple task from the geometry textbook for the first grade.

The area of ​​a geometric figure (and most ceilings and rectangles in apartments are rectangles) is equal to the product of its two sides (a and b): S = a * b. The unit of length is a meter, therefore, the area is measured in square meters (m 2).

• We carry out the measurement using a construction tape measure with a lock, preferably at the baseboards, since if we do this in the middle of the room, an error may result. It is desirable to have an assistant who will hold one end of the tape measure. Otherwise, you can fix it with some kind of heavy object or hook it on the edge of the plinth.
• If the length of the measuring tape is insufficient, the measurement will have to be carried out in stages, fixing the tape and making marks. Then we summarize the length sections according to the marks and get the total size.

For example, the length of the room is 5 m, and the width is 4 m. We multiply these two numbers, we get the area of ​​​​the room - 20 m 2.

How to measure the area of ​​​​a room with a niche

Let's complicate the task: let's say there is a rectangular niche in the room. In this case, we divide the room into two rectangles, large and small. You will need to measure two sides of a large and two sides of a small rectangle:

• the length of the smaller side of the room (distance to the niche) a1;
• room width - b1;
• the length and width of the niche a2 and b2.

The area of ​​the room will be equal to the sum of the found areas of the two rectangles: S = a1 * b1 + a2 * b2.

Calculate the area of ​​the room in the figure below.

Here: a1 = 4.35 m; b1 = 5 m; a2 = 2.65 m; b2 = 2.5 m.

S \u003d 4.35 * 5 + 2.65 * 2.5 \u003d 21.75 + 6.625 \u003d 28.375 m 2.

How to calculate the area of ​​a room of any shape

The principle of calculation is the same for rooms of any shape:

The room must be divided into the simplest geometric figures, the areas of which are calculated according to known formulas, then the areas of these figures must be added. Sometimes the reverse operation is performed - S figures are subtracted from the total S: for example, S of the bases of the columns must be subtracted from the S rectangle.

For calculations, it is enough to know the following formulas:

• S of the rectangle = a * b (1), hereinafter, a and b are the length and width of the room.
• S right triangle(this is half a rectangle), that is, an S triangle. = a*b/2(2);
• S circle \u003d π * r 2 (or π * d 2 / 4) (3), where π \u003d 3.14, r and d are the radius and diameter of the circle;
• S semicircle \u003d π * r 2 / 2 (4);
• S trapezium with bases a, b and height h: S trapezoid. = (a + b)/2 * h (5).

How to calculate the area of ​​​​ceilings and walls

The ceiling area is usually equal to the floor area, except for multi-level ceilings, so it does not need to be calculated separately.

S walls are needed most often to determine the number of ceramic tiles or wallpaper rolls.

• If all the walls are covered with wallpaper or tiles, then it is easier to first calculate the total perimeter of the room P by adding up all the lengths of its walls. P \u003d 2 * (a + b).
• Then P must be multiplied by the height of the walls h. We get the total area of ​​all walls S.
• Now, from S walls, subtracts S windows and a doorway, previously calculated by formula (1).

Thus, S for finishing is determined by the following formula: S otd. = (2 * (a + b) * h) - S windows - S doors (6).

If partial finishing is performed, then the surface area of ​​the wall intended for finishing is calculated.

An example of how to find the area S otd. for a wall with a door:

S div. \u003d S walls - S doors \u003d 4 * 2.7 - 1 * 2.1 \u003d 8.7 m 2.

How to calculate how many tiles for an apron

• To lay out an apron from tiles in the kitchen, you must first mark it and measure the length and height.
• Then, according to the formula (1), we calculate the area of ​​\u200b\u200bthe apron.
• To calculate the number of tiles, it is necessary to divide S of the apron by S of one tile: N pl. = S fart. / S pl. one tile (7).
• To the estimated amount of N, you need to add another 5 - 10%, taking into account the cutting of corner tiles and the inevitable part of the material to be consumed (part of the tile is rejected by the tile cutter).

That is, the total number will be equal to: N total. = N sq. + N sq. * (0.05 - 0.1) (8).

The number of bathroom tiles, if all walls are covered with it, is calculated using the method described above:

• according to the formula (6) we calculate S of the finishing surface of the walls .;
• according to f-lams (7) and (8) - the number of tiles.

How to count the number of wallpapers

The calculation of the required number of wallpapers is more complicated, since it is necessary to take into account:

• wallpaper pattern step;
• cut margin.

The number of rolls is counted in two ways:

• by wall area;
• along the perimeter of the room and the number of paintings.

There are ready-made wallpaper calculation tables.

First calculation method

The first method is simple, but it is very approximate, so you have to buy wallpaper with a large margin, which is uneconomical.

• The surface area of ​​the finish S is calculated. minus windows and doors - according to f-le (6).
• The area of ​​one roll is determined: the length of the roll is multiplied by its width. For example, if there are 10 meters of canvas in a roll 60 cm wide, then S of one roll will be 6 m 2.
• Then we divide S otd. per S of one roll, and the resulting figure is rounded up to an integer.
• We add one or two rolls to the stock.

The second way to calculate

The second method is more accurate and economical, but also more complicated:

• We calculate the perimeter of a part of the room P, without window and door openings, for which whole canvases will go.
• We determine the length of one whole canvas l c .: to the height of the room (usually 2.60 m) we add a margin for a pattern of 0.5 m and for a cut - 0.1 m.
• We calculate the number of whole canvases N c., Dividing P by l c.
• Now we calculate in the same way the length l k. and the number N k. of pieces of canvases above the windows, doors and under the windows.
• We determine the total footage of whole canvases L c. = N c. * l c.
• We calculate how many meters there will be cut pieces L k. = N k. * l k.
• We calculate the total length of the paintings: L total. = L c. + L to.

How to calculate the area of ​​​​a room in square meters: instructions for measuring a living room, bathroom, kitchen, balcony and garage

How to calculate the area of ​​​​a room in square meters: instructions for measuring a living room, bathroom, kitchen, balcony and garage

In order to save on building materials, you need to know the exact footage of the dwelling.

To do this, you need to be able to correctly measure the room.

This article details how to do this.

Where to start measuring

Each room has 3 indicators to measure:

1. Length. Most often there are values ​​\u200b\u200bof 4 or 4.5 meters.
2. Width. In standard apartment building the width of the rooms is 3 or 3.5 meters.
3. Height. In new buildings, the height of the walls is 2.5 meters, and for example, in buildings of the Stalin era, it can reach three meters.

To measure square meters, you will need the following tools:

• roulette;
• pencil;
• paper;
• calculator.

Algorithm for calculating the quadrature of the room

For the calculation, it is necessary to apply the area formula: S \u003d a * b, where S is the area, a is the length, b is the width.

So, let's calculate the footage using the example of a living room with the following indicators:

Height (h) = 2.5 m;

Width = 3 m;

Length =5 m.

Let's calculate the floor area of ​​the room: S= 5 m*3 m = 15 m2. You will need this information when purchasing. floor covering or installation stretch ceiling.

We calculate the area of ​​\u200b\u200bthe room along the walls using the following formula:h *(a*2+ b*2).

We calculate as follows: 2.5 m * (5 m * 2 + 3 m * 2) \u003d 40 m2.

In order to obtain net area values, it is necessary to subtract the area of ​​doors and windows from 40m2.

Doors and window openings

Standard doors have the following dimensions:

Width = 0.8 m, height = 2.0 m.

We multiply the indicators on each other: S \u003d 0.8 m * 2.0 m \u003d 1.6 m2.

standard window in high-rise building has the following dimensions:

Width \u003d 1.6 m, height \u003d 1.5 m. In the course of the product of two numbers, we get the area: S \u003d 1.6 m * 1.5 m \u003d 2.4 m2.

Snet \u003d 40 m-2.4 m-1.6 m \u003d 36 m2.

Master's note: determining the net area will help you choose the right amount of wallpaper tubes, drywall sheets and other finishing materials.

Irregular room

It is necessary to measure the quadrature of the room in stages, dividing it into several sections of the correct shape.

So let's look at concrete examples ways to calculate the footage:

1. Kitchen. Each kitchen has a ventilation shaft, a radiator along the window, a door, a window and a built-in storage shelf. Let's calculate the net area of ​​\u200b\u200bthe walls of the kitchen for.

Kitchen details:

Height =2.5 m;

Width=3m;

Length =3.5m.

Door size: width=0.8m, height=2.0m;

Window size: width 1.2 m, height = 1.5 m;

The ventilation shaft has the following dimensions: width =50 cm, length =30 cm; height = 2.5 m;

Built-in shelf: width = 20 cm, length = 50 cm, height = 2.5 m;

Radiator dimensions: width = 10 cm, length = 100 cm, height = 50 cm.

Let's calculate the net area:

First, we find the total area: (3.5 m * 2) + (3 m * 2) * 2.5 m = 32.5 m2;

Windows: S net = 1.2 m * 1.5 m = 1.8 m2;

Doors: S net = 0.8 m * 2.0 m = 1.6 m2;

Ventilation shaft: S net = (50 cm * 2) + (30 cm * 2) * 2.5 m = 400 cm2 or 0.40 m2;

Built-in shelf: S net = (20 cm * 2) + (50 cm * 2) * 2.5 m = 350 cm2 or 0.35 m2;

Radiator surface area: (10 cm *2) + (100 cm *2) * 0.5 m = 110 cm2 or 0.11 m2.

Now we determine the number of net square meters by subtracting their total area: S net kitchen walls \u003d 32.5 m2 - 1.8 m2 - 1.6 m2 - 0.40 m2 - 0.35 m2 - 0.11 m2 \u003d 28, 24 m2.

Helpful advice: to count the number of wallpaper tubes, you need to divide the net area by the number of sheets in the tube.

A standard tube has the following dimensions: width = 50 cm, web length = 10 m. The height of the walls of the apartment is 2.5 m, and it follows that 4 paper sheets are included in one tube: 10 m / 2.5 m = 4 sheets.

Let's calculate how many tubes are needed to:

28.24 m2 / 4 = 7.06 tubes. But since a paper canvas can contain a pattern in increments of 0.3 or 0.5, the number of tubes should be rounded up to 8.

1. Bathroom. Calculate the number of boxes of tiles for a standard bath. In order to correctly calculate the quadrature of the room, it is necessary to take measurements taking into account the trimming of ceramic tiles.

We know standard size doors: width =0.8 m; height = 2.0 m.

The size of a typical bathroom is: width 2.3 m; length = 1.6 m, height = 2.5 m.

We calculate the net area of ​​the bath:

S baths \u003d (2.3 m * 2) + (1.6 m * 2) * 2.5 m \u003d 19.5 m2.

Then, subtract the following values:

S net = 19.5 m2 - 1.6 m2 = 17.9 m2.

In order to calculate how many boxes of tiles you need, you should decide on the size ceramic product. The tile comes in the following sizes: 10x10; 10x20; 20x30; 30x30. Let's take a more common option: 30x30.

There are 10 pieces in one package and, knowing the size of the tile, you can calculate the number of pieces per 1 m2:

1 m2 is 100 cm by 100 cm, it follows that 1 m2 includes 9 whole tiles 30x30 and 7 tiles, 10x10 cm in size.

Let's determine the number of whole tiles and the number of cuts:

17.9 m2 / 9 \u003d 1.9 - round up and get 20 boxes of whole tiles;

20 * 7 = 140 small tiles, 10x10 in size.

If you lay tiles on a plane without trimming, then you should take 20 boxes, and if with trimming, then 16.

1. Balcony. To get the net area of ​​the balcony, it is necessary to measure the frames with glazing. The perimeter of the balcony is measured excluding windows.
2. Garage. As a rule, the garage is a box with a small window. To calculate the net area, it is necessary to measure the dimensions of the gate.

try on the area of ​​​​a round window, ceiling, building wall in the form of an irregular shape or an octahedron, you can use improvised means.

Take a tape measure and measure the maximum diameter of the circle, for example, it turned out to be 100 cm. We calculate the radius: 100 cm / 2 \u003d 50 cm - this is ¼ of a circle in the form of a triangle.

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