home → In English How to calculate m2 of a room. How to calculate the area of a room: useful techniques and formulas

How to calculate m2 of a room. How to calculate the area of a room: useful techniques and formulas

When carrying out repair work, the question arises:How much is a square meter?materials are needed to cover it.

In order not to spend extra money, it is better to start by makingcalculation of square metersrooms and only then go to the store with specific requirements.

On packages with paints, plaster, and primer, it is necessary to indicate for what size room this amount of the mixture is designed.

The main question is how many packages or cans are needed to cover the wall or floor area.

What is a square meter

First you need to decide what a square meter is. People who did not study mathematics well at school still sooner or later face the problem of counting the amount of building materials. That's whysquare meter is the main reference point when determining the area of a room.

If you draw a square (this is a geometric figure with equal sides), and the side is equal to 100 cm, then when multiplied by 100 we get the number 10000 cm. This means that the size of this figure is 10000 cm2. It could be simpler. Calculate in meters: 100 cm is 1 m. We apply the formula for calculating the area - we multiply the two sides, that is, we multiply 1 by 1, we get 1 m. This means that the size of the square is 1 sq.m.

Tools for calculating square meters

For calculations, you need to prepare a calculator.

If it is not there, then the multiplication table on a regular notebook for a first grader.

If the walls are not 2 or 3 meters, but, for example, 2.5 meters, then a calculator is still better. This is too difficult a load for a brain that is not used to working with numbers.

It is advisable to have a piece of paper and a pen on hand for writing.

You need to measure with a tape measure or centimeter.

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Formula for calculating square meters

To calculate the area, you need to applysquare meter formulaA X B, where number A is the length of one side, and number B is the length of the second side. They can be the same if the shape of the floor or wall is square.

Most often, it is not square, but rectangular, that is, number A will have one value, and number B will have another. They will need to be multiplied in your head, or using a multiplication table, or on a calculator. And the resulting number will be the area that will need to be covered with paint or something else.

It happens that the shape of the floor is not standard, but, for example, trapezoidal. Then it’s more difficult, especially for those people who don’t know what a triangle is (this also exists in nature). To calculate the size of a trapezoid, you must first calculate the area of the rectangle in the middle, then the size of each triangle on the sides , then add these three numbers. Isn't it easier to immediately call a team of workers? Let them thinkhow to calculate the square meters of a room.

Important!If at this stage there is a misunderstanding, then it is better to immediately call the mathematics teacher and ask him to calculate,how many sq. meters has a room.

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Floor or ceiling area

The ceilings and floors in an ordinary apartment are the same.How to calculate square meters?Very simple. If the room is an attic, then there is no ceiling - there is only a floor and walls.

Stage No. 1. Measure the length of the room and write down the resulting number on paper. If the number is an integer, then we simply write the number. For example, 5 (m). If the number is greater than 5 but less than 6, then you will have to remember decimals and write, for example, 5.5 (m).

Stage No. 2. Measure the width of the room and write it down in the same way. For example – 3m.

Stage No. 3. Now you need to multiply these two numbers. Example: 5 x 3 = 15m. So, the floor area is 15 square meters. m. Consequently, the size of the ceiling will also be 15 square meters. m. Write this number separately and circle it with a pen.

Solid wall area

How to calculate quadraturesolid wall? Just like we measured the floor or ceiling. The algorithm of actions is the same as when calculating the size of the floor:

measure the length of the wall and write it down;
measure height;
multiply two numbers - the result will bearea in square meters.

Example: height 2.20 m, length 7 m. 7 x 2.2 = 15.4 m. Wall area – 15.4 sq. m.

How to calculate square meters of a wall with a window

It will be more difficult to deal with the wall on which the window is located.

Algorithm of actions:

Using the scenario already completed, calculate the size of the wall. Let there be an already known number - 15.4 m2.
Next, measure the height and length of the window. Multiply numbers. For example: length 1.5 m, height 1.2 m. If you multiply, you get 1.8. This means the window area is 1.8 square meters. m.
We take the area of the wall and subtract the window size from it: 15.4 – 1.8 = 13.6. The area that will need to be tidied up is 13.6 square meters. m.

Important!The numbers that are obtained during the calculations must be written down and circled with a pen so as not to get lost in your own calculations.

How to calculate square meters of a wall with a door

Similar actions must be performed when requiredcalculate square meterswalls with a door. If the door, from a mathematical point of view, is a simple rectangle, then we calculate its area using the usual formula A X B. That is, you need to measure the height and length, then multiply the numbers and get the size of the door.

Next, we subtract the size of the door from the area of the wall and get the square footage for which it will be necessary to buy finishing materials. If the previous owner of the apartment made a door with an arch, then there is no way to do without calculating the size of the circle.

Measuring the area of complex figures

Circle and triangle - complex figures for independent calculations. How to measure square meters of a circle if there is no mathematical or engineering education? Again according to the formula.

How to Measure a Circle Size

There is a formula for calculating the area of a circle. There is such a constant number - the ratio of the circumference of a circle to its diameter. It is the same for all circle sizes. It's called pi and equals 3.14. This is the number used in calculations.

Stage No. 1. Measure the diameter (this is the line that passes through the center of the circle from one edge of the circle to the other). Let the diameter be 3 m. Next, we find the radius - this is half the length of the diameter. That is, 1.5 m. We write down the radius on paper.

Stage No. 2. We make calculations using the formula S = PR2, where S is the area of the circle, P is a constant number, and R is the radius of the circle. It turns out 3.14 x (1.5 x 1.5) = 7.065. The area of this circle is 7.065 square meters. m.

But this is the area of a whole circle. The arch above the door is half a circle. So we still need to divide given number by two and then add to the rectangular area of the door. 7.065: 2 = 3.53 m2.

How to measure the area of a triangle

If the previous owner of the apartment was a mathematician, then he could well have made triangular figures on the ceiling, which had to be restored and highlighted with a different color or plaster. You'll have to count so you don't overpay.

Calculation of a square meterin a triangular figure begins with a careful examination of this figure.

It is necessary to find the base of the triangle, that is, the line on which the other two rest (like the roof on a house). Next, draw a line from the opposite top to the base. Write down these two numbers.

Stage No. 1. Divide the base of the triangle by 2 and write it down. This number will come in handy in the near future. Measure the height and write it down too.

Stage No. 2. Produce m2 calculation figures. To do this, you need to use the formula: S = 0.5ah, where S is the area of the triangle, a is the base, and h is the height. Example: base 3 m, height 2.5 m. Total: 0.5 x 3 x 2.5 = 3.75. The size of the triangle is 3.75 m2. Write it down so you don't forget.

Advice!When making calculations, it is better to invite another person to help. One head is good, but two are more reliable.

All you need to do is go to the store and buy materials. Here you still have to count, since not all packages are designed for large rooms. For example, the size of the ceiling in the kitchen3 x 3. How many square metersplaster will be needed if one package can cover 3 square meters. m? We calculate: the ceiling size is 9 square meters. m. One package covers 3 square meters. m. Therefore, 3 packs are needed for the entire ceiling.
If the packaging says that the consumption is12 square meters, that means how muchmaterial is needed to cover a wall measuring 3 x 4 m.

Or another example. Wall in the apartment6 by 4. How many square metersneeds to be painted over? Multiply 6 by 4, we get24 square meters. How much is thisyou need 3 liter cans of paint if each can covers 6 square meters. m? We count: 24 divided by 6. It turns out 4. This means you need to buy 4 three-liter cans of paint to cover the entire wall.

For repair work, it is always better to take a little more materials so that you don’t have to go to the store again.In the future, if you need to tint or whiten something, leftover materials can be a great help.

Choose a tape measure or tape measure. Choose a tape measure or measuring tape marked with centimeters (cm) or meters (m). This device will make it easier to calculate the area in square meters, since they were developed in the same measurement system.

If you can find a tape measure in feet or inches, measure the area using the available units, and then move on to the step that describes how to convert other units to square meters.

Measure the length of the area you have chosen. A square meter is a unit of measurement for the area or size of a two-dimensional object such as a floor or field. Measure the length of one side from one corner to the other and write down the result.

If the length is more than one meter, then count both meters and centimeters. For example, 2 meters 35 centimeters.
If the object you are measuring is not a rectangle or square, then read the third section of this article - “Measuring the area of complex shapes.”

If you can't measure the length at once, do it in stages. Lay out the tape measure and make a mark where it ends (for example, 1 meter or 25 centimeters), then lay it out again and start from the marked area. Repeat until you have measured the entire length. Then add all the measurements together.

Measure the width. Use the same tape measure to measure the width of the object. You need to start measuring by placing the tape measure at an angle of 90º in relation to the length of the object that you have already measured. That is, two lines of a square adjacent to each other. Also write down the resulting numbers on paper.

If the measured length is slightly less than one meter, then round to the nearest centimeter when you take measurements. For example, if the width is slightly larger than the 1 meter 8 centimeters mark, then simply write down “1 m 8 cm.” and don't count millimeters.

Convert centimeters to meters. Usually measurements cannot be made exactly in meters. You will get indicators in both meters and centimeters, for example “2 meters 35 centimeters”. 1 centimeter = 0.01 meters, and therefore you can convert centimeters to meters by moving the decimal point 2 digits to the left. Here are some examples.

35cm = 0.35m, so 2m 35cm = 2m + 0.35m = 2.35m
8cm = 0.08m, so 1m 8cm = 1.08m

Multiply the length by the width. Once you convert all measurements to meters, multiply the length by the width to get the area of the object being measured. Use a calculator if necessary. For example:

2.35m x 1.08m = 2.538 square meters (m2).

Round up. If you get a lot of numbers after the decimal point, for example, 2.538 square meters, then round, for example, to 2.54 square meters. It's likely that you didn't measure to the nearest millimeter, so the final numbers won't be accurate anyway. In most cases we round to the nearest centimeter (0.01m). If you need more accurate measurements, read this material.

Whenever you multiply two numbers with the same unit of measurement (for example, meters), the answer must be written in the same unit of measurement (m 2, or square meters).

Instructions

For a room shaped like a rectangle or square, use the appropriate formula, which uses data on the lengths of the sides of these geometric shapes:

S = A x B, where

S – area;
A and B are the lengths of the sides of the rectangle.

Move the furniture away from the walls and take measurements using a measuring tape. Using the help of a partner, measure the length of the walls along the baseboard, avoiding bending the tape measure and its excessive tension.

Convert the measurement data into meters and record it on a piece of paper. Multiply the measured length of the room by its width. As a result, you will receive the required area of the room, expressed in square meters. For example, if the length of the room was 5.3 m and the width was 3.8 m, then the area of the room would be 5.3 x 3.8 = 20.14 square meters. m.

If the room has an irregular shape, for ease of calculation, draw its diagram on a sheet of paper. The diagram can be drawn arbitrarily, without observing exact proportions; the main thing is that the drawing conveys the outlines of the room.

Divide the space of the room in the drawing into several simple geometric shapes. Using a tape measure, measure the selected elements and write down the results next to each dividing line. Consistently calculate the areas of all the figures that make up the space of the room. Add up the individual areas to get the overall result you are looking for.

To calculate a circuit element that has the shape of a right triangle, use the formula:
S = (A x B) / 2, where
S – area of the triangle;
A and B – leg lengths;
x is the multiplication sign.

When calculating the area of a room that has niches, projections, columns and other structural elements, be sure to take their presence into account. Depending on the type of element, the area it occupies must be added to the area of the simple figure or, conversely, subtracted from it.

Square apartments- a value useful both for developers and tenants, and for owners and tenants. It is necessary to calculate the cost of purchase or rental, payment of utilities, repairs, etc.

From time to time we need to know the area and volume of a room. This data may be needed when designing heating and ventilation, when purchasing building materials and in many other situations. It is also periodically required to know the area of the walls. All this data can be easily calculated, but first you will have to work with a tape measure to measure all the required dimensions. How to calculate the area of the room and walls, the volume of the room will be discussed further.

Room area in square meters

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Paper and pencil or pen.
Calculator (or count in a column or in your head).

A simple set of tools can be found in every household. It’s easier to take measurements with an assistant, but you can do it yourself.

First you need to measure the length of the walls. It is advisable to do this along the walls, but if they are all filled with heavy furniture, you can take measurements in the middle. Only in this case, make sure that the tape measure lies along the walls, and not diagonally - the measurement error will be less.

Rectangular room

If the room is of the correct shape, without protruding parts, it is easy to calculate the area of the room. Measure the length and width and write it down on a piece of paper. Write the numbers in meters, followed by centimeters after the decimal point. For example, length 4.35 m (430 cm), width 3.25 m (325 cm).

We multiply the found numbers to get the area of the room in square meters. If we look at our example, we get the following: 4.35 m * 3.25 m = 14.1375 sq. m. In this value, usually two digits are left after the decimal point, which means we round. In total, the calculated square footage of the room is 14.14 square meters.

Irregularly shaped room

If you need to calculate the area of the room irregular shape, it is divided into simple shapes - squares, rectangles, triangles. Then they measure all the required dimensions and make calculations using known formulas (found in the table just below).

One example is in the photo. Since both are rectangles, the area is calculated using the same formula: multiply the length by the width. The found figure must be subtracted or added to the size of the room - depending on the configuration.

Room area of complex shape

We calculate the quadrature without the protrusion: 3.6 m * 8.5 m = 30.6 sq. m.
We calculate the dimensions of the protruding part: 3.25 m * 0.8 m = 2.6 sq. m.
Add up two values: 30.6 sq. m. + 2.6 sq. m. = 33.2 sq. m.

There are also rooms with sloping walls. In this case, we divide it so that we get rectangles and a triangle (as in the figure below). As you can see, for this case you need to have five sizes. It could have been broken differently by putting a vertical rather than a horizontal line. It doesn't matter. It just requires a set of simple shapes, and the way to select them is arbitrary.

In this case, the order of calculations is as follows:

We consider the large rectangular part: 6.4 m * 1.4 m = 8.96 sq. m. If we round, we get 9.0 sq.m.
We calculate a small rectangle: 2.7 m * 1.9 m = 5.13 sq. m. Round up, we get 5.1 sq. m.
Calculate the area of the triangle. Since it is at a right angle, it is equal to half the area of a rectangle with the same dimensions. (1.3 m * 1.9 m) / 2 = 1.235 sq. m. After rounding we get 1.2 sq. m.
Now we add everything up to find the total area of the room: 9.0 + 5.1 + 1.2 = 15.3 square meters. m.

The layout of the premises can be very diverse, but general principle you understand: we divide into simple shapes, measure all the required dimensions, calculate the quadrature of each fragment, then add everything up.

Another important note: the area of the room, floor and ceiling are all the same values. There may be differences if there are some semi-columns that do not reach the ceiling. Then the quadrature of these elements is subtracted from the total quadrature. The result is the floor area.

How to calculate the square footage of walls

Determining the area of walls is often required when purchasing finishing materials - wallpaper, plaster, etc. This calculation requires additional measurements. In addition to the existing width and length of the room you will need:

ceiling height;
height and width of doorways;
height and width of window openings.

All measurements are in meters, since the square footage of walls is also usually measured in square meters.

Since the walls are rectangular, the area is calculated as for a rectangle: we multiply the length by the width. In the same way, we calculate the sizes of windows and doorways and subtract their dimensions. For example, let's calculate the area of the walls shown in the diagram above.

Wall with door:
- 2.5 m * 5.6 m = 14 sq. m. - total area of the long wall
- how much does a doorway take up: 2.1 m * 0.9 m = 1.89 sq.m.
- wall excluding doorway - 14 sq.m - 1.89 sq.m. m = 12.11 sq. m
Wall with window:
1. squaring of small walls: 2.5 m * 3.2 m = 8 sq.m.
2. how much does a window take: 1.3 m * 1.42 m = 1.846 sq. m, round up, we get 1.75 sq.m.
3. wall without window opening: 8 sq. m - 1.75 sq.m = 6.25 sq.m.

Finding the total area of the walls is not difficult. Add up all four numbers: 14 sq.m + 12.11 sq.m. + 8 sq.m. + 6.25 sq.m. = 40.36 sq. m.

Room volume

Some calculations require the volume of the room. In this case, three quantities are multiplied: width, length and height of the room. This value is measured in cubic meters (cubic meters), also called cubic capacity. For example, we use the data from the previous paragraph:

length - 5.6 m;
width - 3.2 m;
height - 2.5 m.

If we multiply everything, we get: 5.6 m * 3.2 m * 2.5 m = 44.8 m 3. So, the volume of the room is 44.8 cubic meters.

A variety of real estate transactions, exchange, sale or purchase, entering into inheritance rights, the decision to donate your own housing in the complex or the part of the apartment due to the donor.

Domestic lawyers specializing in civil law, notaries and lawyers on the problems of lawsuits in the field of housing disputes do a lot of things.

Today, this area requires accurate calculations of available space and large quantity supporting certificates, acts and other necessary paper support.

Today there are more and more homeowners of different price levels.

They all keep on their innermost shelves whole weighty folders with documents, among which there must be a certificate about the total area of the apartment and individual rooms and premises.

There are many questions, but most of them can be answered in the Civil Code of the Russian Federation and from a professional lawyer, who will certainly explain all the nuances regarding this topic.

Let's start with the basics - why calculations and measurements of square meters of an apartment or house are made and why this is such an important aspect of housing law.

Indeed, without relatively simple arithmetic formulas, each owner can accurately determine how many rooms belong to the useful and total area that he has.

Why count and measure?

It would seem that everything is relative and, having lived in their apartment for many years, not everyone thinks about how much area it makes up. But even if you have to think about such a serious question several times throughout your life.

First of all, this need can arise on completely everyday grounds, because each of us lives and carries out various actions every day, which, one way or another, require basic knowledge in the field of mathematics, geometry, and simply abstract thinking.

Why do you need to make measurements and calculations:

When planning repairs and reconstruction internal main and auxiliary premises.
When assessing the need in construction and finishing materials.
To carry out transactions in the field of purchase and sale of apartments or individual parts of an entire residential complex.
In the absence of a master plan for a residential apartment.
For the issuance of various types of certificates by BTI authorities, including inventory list.
An independent appraiser to prepare a housing assessment when carrying out purchase and sale and other legal procedures with residential premises.
To determine possible charges for consumed utilities- for example, heating and others related to area and dimensions.
To improve the ergonomics of housing, indirect determination of heat loss and development of areas for saving resources.
When conducting overhaul in the house as a whole and on individual floors.
Reinstallation of new windows and doors requires calculations of compliance with the general concept of the apartment with door and window openings.

And these are not all the reasons that require accurate measurements. This is especially true for apartments where non-standard layouts and features of the arrangement of rooms and unusual geometry predominate.

Formulas

Nowadays, software and computer programs are used for this.

Thanks to the efforts of developers, you can use a variety of calculation products that, by analyzing measurement results, make it possible to carry out calculations and, based on it, clarify or determine the total area of housing.

The priority of this method is complete compliance with the final data, amazing accuracy, and the absence of the need to calculate every meter in rooms and other premises.

At the same time, the logic of calculations and the basic techniques and methods are preserved:

Rectangular area is calculated by multiplying length and width.
A round room is more difficult to calculate. By determining the radius squared multiplied by “pi” or the diameter squared divided by four and multiplied by the same “pi”.
Triangular rooms can be of different types. A right triangle is calculated by multiplying the legs and dividing the result by 2. Other shape options are calculated by multiplying the sides of the angle and the sine of the angle between them.
Complex room kennels are determined by adding up individual pieces from simpler shapes - squares, rectangles and other geometric shapes.

How to calculate the square meters of a room?

The calculation of housing area is carried out in accordance with the standard formulas given above.

According to the system of reference units in force in our country and in most developed countries of the world, area is measured in square meters:

Logically, when linear dimensions are multiplied - meters by meters, they double and the area has a two-dimensional designation - square meters.
If the area of the apartment has complex geometry and non-standard outlines, then calculations can be made by applying film or measuring individual fragments.

Through simple calculations, the areas are added up and the owner receives information about the full size of his real estate.

How to calculate square meters of walls?

This is a much simpler action than measuring areas. Walls usually have a standard shape, so performing these manipulations is much simpler and more elementary.

In this case, two sides are multiplied together - length and height, and when calculating, the result is also obtained in square meters.

Converting other units of measurement

Conversion of the obtained data into other more convenient standard units of measurement is carried out using one’s own school knowledge or through conversion tables, which can be found on specialized websites with online calculators.

To make initial measurements of the length and width of rooms, you need to stock up on a construction meter or tape measure, a special pencil, a notepad and a calculator, as well as attention, patience and accuracy.

3 6 458 0

Most often, this question is relevant to those who will have to make repairs in the near future. The amount of building materials needed depends on the square meters of the room or apartment. The cost of repair work also depends on the square footage. Therefore, learning to calculate square meters of housing yourself is very important. We will share with you some ways to do this correctly. Taking into account our advice, you will easily and very quickly learn how to do this yourself.

It is better to use a tape measure with a large supply of meter tape. For example, 10 meters. It's much more convenient. But if you have a tool of shorter length, you don’t have to look for a replacement. You will only have to rearrange it more often. The main thing is not to miss the point where the footage ends.
You may need help. The tape measure must be held or somehow secured at the starting and subsequent points.
It is necessary to draw the tape measure along as straight a line as possible. Otherwise, the calculations may be higher. As a result, the quadrature of the room is incorrectly calculated.
Measure the perimeter of the walls along with the windows and door. Then, separately calculating their sizes, subtract them from the total perimeter and get the square footage of the room. It's faster and more convenient than measuring out the room in small parts.

Place the beginning of the tape measure in one of the corners of the room (A). It should be recorded there. Pressing it tightly against the wall, stretch the 10-meter tape (depending on your tape measure), stretch it to the second corner of the room (B). Here you also fix the tape measure or ask someone to hold it. Stretch the tape measure to the next corner of the room (C).

It turns out that you measured the width and length of the room. Multiply the number that comes out by 2.

For example: 9 meters * 2 = 18 m - the total perimeter of the walls of the room.

The next stage is the height of the walls. We measure with a tape measure from the ceiling (A) to the floor (B). We multiply the resulting figure by the perimeter of the walls.

For example: The height of the walls is 3 meters. 3 m * 18 m = 54 m - the total area around the perimeter without subtracting window openings and doors.

If there are several windows of the same size in a room, it is enough to measure only one window. Using a tape measure, measure the width (A-B) and height (B-C) of the window slopes. We multiply both numbers.

For example: 2 m (window width) * 1.8 m (window height) = 3.6 m - window perimeter.

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

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

This article describes in detail how to do this.

Where to start measuring

Each room has 3 indicators to measure:

Length. The most common values are 4 or 4.5 meters.
Width. In a standard apartment building, the width of the rooms is 3 or 3.5 meters.
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 square footage of a room

To calculate, you need to apply the area formula: S = a*b, where S is area, a is length, b is 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 area of the room by floor: S= 5 m*3 m = 15 m2. You will need this data when purchasing flooring or installing a stretch ceiling.

We calculate the area of the room based on the walls using the following formula:h *(a*2+ b*2).

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

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

Doors and window openings

Standard doors have the following dimensions:

Width =0.8 m, height = 2.0 m.

We multiply the indicators by each other: S = 0.8 m * 2.0 m = 1.6 m2.

Standard window in multi-storey building has the following dimensions:

Width = 1.6 m, height = 1.5 m. By multiplying two numbers, we get the area: S = 1.6 m * 1.5 m = 2.4 m2.

Net =40 m-2.4 m-1.6 m = 36 m2.

Master's Note: Determining the net area will help you select the right number of wallpaper tubes, plasterboard sheets and other finishing materials.

Irregularly shaped room

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

So let's look at specific examples Methods for calculating footage:

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 clean area of the kitchen walls for wallpapering.

Kitchen details:

Height =2.5 m;

Width=3 m;

Length =3.5m.

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

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 = 32.5 m2 - 1.8 m2 - 1.6 m2 - 0.40 m2 - 0.35 m2 - 0.11 m2 = 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.

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

Let's calculate how many pipes are needed to glue the kitchen:

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

Bathroom. Let's calculate the number of tile boxes for a standard bath. To correctly calculate the square footage of a room, it is necessary to take measurements taking into account the trimming of ceramic tiles.

We know the standard door size: 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 bathtubs = (2.3 m*2) + (1.6 m*2) *2.5 m = 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 of the ceramic product. Tiles come 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 tiles, you can calculate the number of pieces per 1 m2:

1 m2 is 100 cm by 100 cm, which means that 1 m2 includes 9 whole 30x30 tiles and 7 10x10 cm tiles.

Let's determine the number of whole tiles and the amount of trimming:

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

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

If you lay the tiles flat without trimming, then you should take 20 boxes, and if with trimming, then 16.

Balcony. To get the net area of the balcony, you need to measure the glazed frames. The perimeter of the balcony is measured without taking into account the windows.
Garage. Typically, a garage is a box with a small window. To calculate the net area, you need to measure the dimensions of the gate.

Try it on the area of a round window, ceiling, building wall in the form of an irregular shape or an octagon, can be done using improvised means.

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

If we visually divide the circle into 4 parts and connect the points with straight lines, we will get 2 isosceles triangles or 1 square. We know the part of an isosceles triangle, therefore, all sides will be 50 cm. It remains to find the area of a square where all sides are 50 cm. You can calculate the total area of any structure using an online program.

Watch the video in which the master explains in detail how to correctly calculate the area of the walls in the apartment.

When calculating the amount of finishing materials required for repair work, it is necessary to know such a value as the area of the walls. This is necessary so that there are neither fewer nor much more consumables than needed. To calculate the area of the walls, it is not necessary to resort to the services of measurers. You can do everything yourself and remember school curriculum in geometry, where formulas for finding areas are mentioned. If your relationship with geometry does not work out, then this article will definitely help you find the right value, putting everything into order.

Algorithm for calculating wall area
To calculate the area of the walls, you need to look into a mathematics textbook and find formulas for finding the perimeter and area of geometric figures. To calculate the area of the walls of a rectangular room, you can use a convenient algorithm:

We measure the length and width of the room. If the room is rectangular, then you need to measure the length of two adjacent walls. These values will be sufficient to calculate the perimeter.
Calculate the perimeter of the room. To do this, we use the formula P=(a+b)×2, where a and b are the length and width of the walls. To find the perimeter of a room with a non-standard layout, you simply need to add up the width of all the walls.
We measure the height of the room. The distance from floor to ceiling can be measured at the corner of the room. This will be its height.
Find the area of the walls. To calculate the area of the walls, you need to use the formula S=P×h, where h is the height of the room.

For example:

the width of one wall is 4 m;
another width is 3 m;
room height - 2.5 m.

Then P=(4+3)×2=14 m; and S=14×2.5=35 m².

But that is not all. There is an area in the room that does not need to be finished. This is the area of windows and doors. You need to calculate the area of the walls taking these values into account in order to get a more accurate result. To do this, subtract the area of the windows and the area of the doors from the area of the walls. For example, in a room there is one window 1.3x1.5 m and one door 61x192 cm. Then the window area will be 1.95 m², and the door area will be 1.1712 m². We add these two values and subtract from the area of the walls: 35-(1.95+1.1712) ≈ 32 m².

If the room is non-standard
If the room is not rectangular in shape, then you can calculate the area of the walls of the house in another way. To do this, you need to calculate the area of each wall separately and add up the results obtained, first subtracting the area of windows and doors in the walls. The formula will look like S=S1+S2+S3+S4.

In special documentation, or technical passport, both the area and perimeter of both the entire apartment and the dimensions of individual rooms must be indicated. If such a “piece of paper” is missing, then you can calculate the area of the walls on your own. It’s not for nothing that they taught us at school!