Willingness to renovate the premises and refresh appearance walls begins with the selection of finishing materials. Most often, the walls of residential premises are updated. This is a material that people of different incomes are happy to use for repairs, and each of them is satisfied with the choice.
Difficulties are possible not in determining texture, quality, etc., but in calculating the material required for gluing. Therefore, every owner needs to know and be able to do it correctly, since a shortage of wallpaper threatens collapse, and its surplus is wasted savings.
There is no difficulty in the calculations, so we arm ourselves with a notepad, pen and remember school curriculum for 6th grade geometry, perhaps use an online calculator.
Formula for finding wall area: S walls = P rooms x H rooms, Where
- S- square rectangular surface walls;
- P- perimeter;
- H- height.
You need to approach room measurements with all responsibility, because the amount of money spent and the quality of repairs depend on them. Let's make the calculation:
- Length - 5.6 meters.
- Width - 3.2 meters.
First, we take measurements (we convert the centimeters obtained during the measurement into meters). For example, if the length of the room is 560 centimeters, then we count 5.6 meters.
- Let's calculate the perimeter - it is equal to the sum of all sides.
P = (a+b) x 2, where a and b are the sides.
We find: (5.6+3.2)x2=17.9 meters. Perimeter P = 17.9 m.
- Let's calculate the perimeter - it is equal to the sum of all sides.
- Determining the height. From the highest point of the wall, plumb down to the lowest point of the wall. It turns out 2.5 meters. H = 2.5 m.
- Using the formula indicated earlier, we calculate the area of the walls: S walls = P rooms x H rooms S walls = 17.9 x 2.5 = 44.8 m 2 The area of all walls for pasting is 44.8 m 2.
- From the resulting number it is necessary to subtract the window balcony blocks(if any) and doorways, since there is no need to glue wallpaper there.
We have one window in our room, the area of which is calculated according to the same scheme. It is equal to 1.8 m2 (1.25m x 1.45m). Door surface - 1.36 m2 (0.70 m x 1.95 m). The total area of surfaces not involved in gluing is 3.16 m2. The net area is calculated as follows: 44.8 – 3.16 = 41.6 m2.
Attention
If the room has custom size, a shape other than rectangular, calculations should be made separately for each wall, and then add up the results.
How to determine the number of rolls needed?
The surface area for wallpapering has been calculated; now you need to determine the number of rolls. To do this, you need to carefully study the labeling of the material. We will be interested in the size of the roll and the location of the pattern.
The pattern on the wallpaper can be positioned in such a way that it does not affect the gluing method, then no adjustment is required. But most often, shifting the pattern is necessary, and this factor must be taken into account when purchasing.
No offset
So let's consider how to calculate the number of rolls of wallpaper without offset, knowing the area of the room. Let's remember math lessons. We study the markings: width of the canvas - 53 centimeters = 0.53 m, length - 10 m. Area of one roll - 0.53 x 10 = 5.3 m 2.
For our room, the quantity calculation will look like this:
Number of rolls = clean S walls: S one roll,
or 41.6 m 2: 5.3 m 2 = 7.8 or 8 rolls (since rounding is done up). It is better to buy one roll in reserve, in case the canvas gets damaged.
With offset
By doing repair work When gluing, you don’t always have to deal with a simple geometric pattern that does not require displacement and adjustment. Most often, knowledge of calculating materials with complex patterns is required. The material for gluing with a pattern offset is calculated according to the same principle.
In the fabric marking, the manufacturer indicates the distance in centimeters required to adjust the material (for example, 20 cm). How larger picture, the higher the indicator. This means that to select a pattern, it is necessary to shift the canvas of each strip by 20 cm. Each roll will take up to 0.6 m of material (since 4 stripes with a room height of 2.5 m cannot be measured for offset wallpaper).
Thus, from one package we get 3 cuts of 2.5 m + 0.6 m each. The remainder of a 10-meter piece will be at least 1.9 m.
Number of rolls with pattern adjustment = (number of rolls without adjustment x number of cuts without adjustment in one roll): number of cuts with adjustment from one roll.
If for our room, the area of the surface to be pasted is 41.6 m 2, an offset of 0.6 m is necessary from each roll, then instead of the 8 required to combine a complex pattern, 11 pieces will be required (8x4:3 = 10.6 or 11). Thus, if the wallpaper requires adjustment (in our case - 20 cm), then the amount that will be needed to renovate the room is 11 pieces.
To calculate wallpaper by area, you can use an online calculator.
About how to customize finishing material according to the drawing, we talked about it in, and we collected information on how to properly and economically glue wallpaper with a pattern
Calculation based on the perimeter of the room and the number of stripes
There is another one quantity calculation method finishing coating: along the perimeter of the room and the number of stripes. The following data is required for calculations:
- perimeter of the room;
- his high;
- wallpaper sizes.
Let's determine the number of cuts in 1 roll = length of one roll: length of one web (in our case it is 10 m: 2.5 m = 4 whole strips).
To determine the number of cuts for a room, we use known indicators- the width of the wallpaper and the perimeter of the room.
Number of cuts = room P: roll width (we enter the already known data for the sample - 17.9 m: 0.53 m = 33).
We calculate the number of rolls of wallpaper per room:
Number of rolls = number of cuts per room: number of cuts, that is, 33: 4 = 8.25.
Each room to be covered has windows and doors, so you can buy 8 pieces.
Calculation table
If all of the above calculation methods are complex, a table will help in calculating the finishing material. To use it, you need the key indicators discussed above: area (length multiplied by width) and height. The process of calculating wallpaper is labor-intensive: you need to take into account many nuances, which in the end may turn out to be decisive.
No matter how carefully they calculate the finishing material, the craftsmen advise purchasing another one additionally. This will be relevant in the case when, during repair work, a cut gets dirty or dented, and it will be impossible to fix it. In an apartment where children live, an additional roll may be useful for unplanned repairs.
Useful video
Attached to the article visual video with calculations of the number of rolls per room:
In contact with
From the size of the room (more on this below) and from the design. One roll is usually 10 meters. If the wallpaper is plain and the ceiling height is 2.5 meters, you can cut the roll into four strips. If the drawing has to be adjusted, there will be three stripes.
stroyday.ruNo pattern alignment: the roll is simply cut into required quantity panels Usually this plain wallpaper, wallpaper with an abstract pattern or vertical stripes.
stroyday.ru The pattern will have to be combined horizontally so that adjacent stripes start with the same elements. And here everything will depend on the height of the repeat - the distance through which the pattern is repeated (indicated on the label). In the worst case, you will have to throw away almost the entire height of the repeat, so when calculating it must be added to the height of the ceiling.
stroyday.ru The pattern is placed diagonally, so each canvas moves. As a rule, half rapport. In this case, you need to add the repeat height and the offset value to the ceiling height: you will find both numbers on the label.
How to calculate the amount of wallpaper using tables
This perfect way, if the room is square or, and the wallpaper does not require adjustment. All you need is the area of the room and the height of the ceiling.
Quantity calculation narrow wallpaper (width – 53 cm, length – 10 meters).
remont-otdelka-m.ru Quantity calculation wide wallpaper (width - 106 cm, length - 10 meters).
remont-otdelka-m.ru How to calculate the number of wallpapers mathematically
If the room has complex shape, there are bends and niches, it is better to count along the perimeter. To do this, you need to add up the lengths of all the walls. Window and door openings less than 60 cm wide are considered a flat wall; wider ones are excluded. The resulting value is rounded up.
Example: 2.75 m + 3 m + 0.4 m + 2.85 m + 4 m + 0.65 m = 13.65 m ≈ 14 m.
Then you need to determine the number of strips: divide the perimeter by the width of the roll. Let's return to our example: 14 m / 1.06 m = 13.2. Round up - 14 wide wallpaper sheets. For narrow wallpaper: 14 m / 0.53 m = 26.4. That is 27 stripes.
Now you need to determine how many strips can be obtained from one roll: the length of the roll must be divided by the length of the strip. And there can be three options:
- If the wallpaper does not require adjustment, the length of the strip is equal to the height of the ceiling. 10 m / 2.75 = 3.6 ≈ 3.
- If the wallpaper is directly joined, the length of the strip is equal to the sum of the ceiling height and the repeat height (0.6 m). 10 m / (2.75 + 0.6) = 2.9 ≈ 2.
- If the wallpaper is jointed, the length of the strip is equal to the sum of the ceiling height, repeat height (0.6 m) and offset value (0.3 m). 10 m / (2.75 + 0.6 + 0.3) = 2.7 ≈ 2.
The last step: divide the number of strips we need by the number of strips in the roll. If the wallpaper is wide, 14 will need to be divided by 3 or 2. If it is narrow, divided by 3 or 2 will need to be 27 stripes.
How to calculate the number of wallpapers using services and applications
Most quick way, if you know the parameters of the room, and the simplest one, if you are not good with mathematics. There are many wallpaper calculators on the Internet, here are just a few good ones.
- Wallpaper calculator from calc.by. It counts both by area and by perimeter, allowing you to exclude door and window openings. You can also set the width and footage of the roll.
- Wallpaper calculator from calc.ru. Performs calculations along the perimeter. Helps determine how much wallpaper and glue is needed.
- Wallpaper calculator from remont-online.com. First, the configuration of the room is selected, then the width of the walls and wallpaper is set. You can also specify the price per roll to find out the total cost of the pasting.
If you are already in the store, use the application for calculations. Here are two free ones with good ratings. non-food products of good quality that cannot be returned or exchanged, including finishing materials. But we are talking only about goods sold by the meter.
In other words, if you don't like the wallpaper, you can take it back to the store. All rolls. In this case, the seller will offer you a similar product, and if there is none, you can write a request for a refund.
Returning one or two extra rolls later will be problematic. But large stores usually accommodate customers halfway. After all, they buy wallpaper in large quantities, and plus or minus one roll does not particularly affect the implementation. Customer loyalty is more valuable.
Just in case, check the return policy before purchasing.
Perhaps it is not only the most traditional way, but also the most universal. Given the wide selection of wallpapers in construction stores, each person will be able to choose wallpaper for their home or office that will best suit them in terms of cost and quality.
Often, when customers come to a wallpaper store, they are already quite savvy about the quality of wallpaper and the price per roll. They know which wallpaper and which manufacturers are best to buy and paste on the walls.
But the question arises about the number of rolls needed for wallpapering walls. In this article we will try to give an example of how to visually calculate how many rolls of wallpaper are needed to paste a room.
If you prefer simple wallpaper that does not have a pattern at all, or has a small pattern that does not require selection when pasting walls, then calculating the number of rolls for a specific room is quite simple.
It is necessary to take measurements of the room, determine the length and width of the room. After this, all that remains is to multiply the length by the width.
Below is the calculation diagram S area of the room.
Calculation example:
Room length= 3.9 meters (or 3 meters 9 centimeters)
Room width=3.45 meters (or 3 meters 45 centimeters)
S area of the room=3.9x3.45=13.45 meters, rounded up to the nearest whole number.
As a result we get S=14 sq.m(or 14 square meters)
After this, we determine in the tables below the number of rolls required for the room for wallpapering.
Example of calculation according to the table:
In the example above we got 14 sq.m, if we chose wallpaper width 53 centimeters, then we next look at table No. 1 in the left column room area with number 14 . Depending on the height of the room, select a column name in the table ceiling height(if our room height is 2.65 meters, then look in the column for ceiling height Ceiling height 2.6 - 3 meters).
As a result, with a room (floor) area equal to 14 sq.m., for roll width 53 centimeter, Ceiling height 2.6 - 3 meters, V table No. 1 we get - you need 10 rolls.
Accordingly, with a room (floor) area equal to 14 sq.m., for roll width 70 centimeters, Ceiling height 2.6 - 3 meters, V table No. 2 we get - 7 rolls of wallpaper
And with a room (floor) area equal to 14 sq.m., For meter wallpaper wallpaper width 106 centimeters, Ceiling height 2.6 - 3 meters, V table No. 3 we get 5 rolls of wallpaper.
That's all the arithmetic is.
Below are 3 tables depending on the width of the wallpaper (for 53, 70 and 106 centimeters):
Table No. 1 53 .
Ceiling height up to 2.5 meters |
Ceiling height 2.6 - 3 meters |
||
Room area |
Number of rolls |
Room area |
Number of rolls |
For wallpaper width 53 centimeters and 10 meters long
Table No. 2 designed for wallpaper of equal width 70
Ceiling height up to 2.5 meters |
Ceiling height 2.6 - 3 meters |
||
Room area |
Number of rolls |
Room area |
Number of rolls |
For wallpaper width 70 centimeters and 10 meters long
Table No. 3 designed for wallpaper of equal width 106 centimeters and 10 meters long.
Ceiling height up to 2.5 meters |
Ceiling height 2.6 - 3 meters |
||
Room area |
Number of rolls |
Room area |
Number of rolls |
For wallpaper width 106 centimeters and 10 meters long
Note: In tables Room areas are indicated by gender(and not wall area), calculations are made for an average standard room, which usually has one door and one window.
You also need to take into account that when calculating the number of rolls of wallpaper using tables, sometimes you need to use and take into account the selection of a pattern existing on the wallpaper itself. If the wallpaper needs to be adjusted, then for every 6 rolls of wallpaper you need to add one more roll.
If you don’t want to manually calculate how much wallpaper you need for a room, if you didn’t understand something when describing the calculations, or if for some reason you can’t calculate how much wallpaper you need yourself, then this will help you online calculator.
Calculator for calculating the amount of wallpaper per room - calculate online
We won't make you boring mathematical calculations. You just need to measure the basic parameters, and the wallpaper calculator itself will approximately calculate the required amount of wallpaper for your room.
Fractional numbers must be entered with a dot, not with a comma! Those. 5.2 - wrong, 5.2 - correct
! The calculation is approximate. The result values may differ slightly from the true value because... all rooms are different and have various characteristics: square, rectangular, with protrusions. Plus, the windows and doors in the room, as well as their location, will have some influence on the error. If you decide to hang wallpaper with a pattern adjustment (rapport), then for every 6 rolls you need to add another roll to the result.
An example of calculating wallpaper for a room using our calculator: room width - 3.21 meters, room length - 3.75 meters and room height (ceiling height) 3 meters. We decided to buy wallpaper length 10 meters, width 1.06 meters.
Thus, we substitute our numbers into the value fields and get the result - 4 roll. If our wallpaper requires adjusting the pattern, then you can safely add another roll, for a total of 5 rolls of the meter paper we like.
Those who want more accurate calculations and measurements can read the article above " how to calculate how much wallpaper you need" and calculate manually.
During renovations, finishing the premises becomes the main priority; in fact, this is what everything is started for, but before purchasing materials, you need accurate calculation of wallpaper for a room. Let's look at how it's done below.
Where does the calculation of wallpaper for a room begin?
What’s most interesting is that there is no need to immediately grab the rolls and find out how many linear and square meters of paper, non-woven fabric, vinyl or fiberglass they contain. First, let’s find out the area of the room that we will cover. Of course, we leave the floors without attention; we are more interested in the walls and, possibly, the ceiling, if you want to decorate it for company. Before calculating the amount of wallpaper per room, take a tape measure and measure the perimeter of the room, it is advisable to do this 2 times, along the baseboard and right under the ceiling. A slight curvature of the walls can give a significant discrepancy in the results, but you will know what error will need to be added to the calculations or, conversely, subtracted from them.
Let's say below, near the floor, the perimeter turned out to be 8 meters, 2 for each wall, a perfect square. But at the top the corresponding indicators are somewhat smaller, all sides of the above geometric figure 5 centimeters shorter. It turns out that the room in volume is not a cube, but a kind of prism or truncated pyramid, except that the inclination of the vertical planes is very slight. However, one can already imagine how in the corners those applied at the top will deviate downward from the overall pattern. Conclusion? You will need to glue it crosswise, that is, laying the pieces of material horizontally. As you can see, having learned only the perimeter and geometry of the room, we at the same time found out the most effective method finishing.
The rest is quite simple. We know the height and length of the wall, substitute the values into the formula S = a. b, Where a And b– the sides of the rectangle, which (sometimes quite arbitrarily) are the wall or ceiling. Then we measure the windows and doors, substitute the new results into the same formula and determine the square footage of the openings that do not require finishing at all. We subtract the result obtained from the area of the walls, and here we have the number from which the calculation of wallpaper per room always begins, indicating how many square meters to be covered.
How to calculate wallpaper based on rapport
So, the entire room has been measured, the data has been recorded, all that remains is to determine how much material will be needed for the upcoming work. If you haven't had time to rip off yet old finishing, try to correlate the width of the sections that were once pasted with the wallpaper that is sold in the store today. The sizes may well coincide, and then all that remains is to count the number of stripes to find out how many panels will be used for the room. Knowing the footage of each individual roll (usually it is written on the back or on the packaging), it is not difficult to calculate how many pieces you need to buy.
However, it may well turn out that the old and new wallpaper do not have the same rapport, or, in other words, a repeating pattern printed on the surface with a certain step. Firstly, the difference may be in the size of the pattern, and secondly, it is quite rare for different series to have the same distance between images. If the store you went to for materials is a branded one, and there is a professional behind the counter, you can ask him about the rapport step, however, if you do not receive an answer to this question, you need to figure out how to calculate the wallpaper yourself. Typically, the distance between the centers of prints corresponds to 52-53 centimeters. Ideally, the height of the wall should be divided by this number without a remainder or with small decimal parts, otherwise waste will appear during the work process.
Let's look at some situation as an example. Let’s say the height of the wall is 3 meters, let’s see how many repeats will fit from floor to ceiling. The formula will look like this n = H/j, Where n– number of drawings, H is the height of the room, and j– step between prints. Substituting the data we have, we get 300/52 = 5.76, which is more convenient to round to 6 rapports. However, 6. 52 = 312, that is, in any case, at least 12 centimeters will be cut off from the wallpaper strip. Why cut? The thing is that in order for the pattern on adjacent strips to match, they need to be shifted relative to each other, and waste is inevitable. Therefore, if the pattern allows (it is not oriented strictly vertically), it is better to glue strips with a large step between images horizontally.
Usually, when shifting strips, half a step between repeats is cut off, therefore, the greater the distance separating the prints, the wider the piece sent to waste.
How to calculate rolls of wallpaper, knowing the area of the walls
Having decided to wallpaper a room, some owners quickly make calculations for the upcoming work on the length, width and height of the room, after which they go to the store with peace of mind. And then it turns out that there is not enough wallpaper. The reason for this is often an incorrect calculation, when the height of the room is 3 meters, and the width and length are 2 and 3, respectively, having the form 3. 2. 3 = 18, but what? That’s right, cubic meters, that is, this is the volume of the room, which we don’t need. And if we take the perimeter as a basis and multiply it by the height, the same numbers will give a different result: (2. (3 + 2)). 3 = 30. Do you see the difference? Without knowing how to calculate rolls of wallpaper, you can buy them for more than 30 real square meters (even without taking into account window and doorways), and for 18 imaginary ones, that is, 12 squares will be missing, which is at least 2 rolls.
By the way, how can you calculate how many packages you will need without knowing how many meters there are in a folded strip of paper, vinyl, non-woven or bamboo fiber? Let's find out what the options are. If you have an apartment with a height of 3 meters, and you are going entirely, from floor to ceiling, it is most convenient, of course, to buy rolls of 18 or 12 meters. However, there are also shorter ones, designed for low-ceiling apartments - 10 and 7 linear meters. It is better to take the first of them, if you take into account the plinth and border along the upper edge of the wall, then the cut will not be 2.64 ( standard height panel houses), and 2.5 meters. The second type of rolls is very convenient for Khrushchev apartments, in which the distance from floor to ceiling is only 2.48 meters; in this case, it will be enough to divide the strip into 2.3 sections.
Now let's move on to how to calculate how much wallpaper is needed to cover a room. When purchasing, it is more convenient to count in rolls, therefore, knowing the area of the walls (and the ceiling, if finishing is provided for it as well), it will not be difficult for you to perform the necessary calculations right in the store. Since the wallpaper dimensions are written directly on the roll, you can immediately determine the area of one panel. Next, we divide the square footage of the walls being pasted by the obtained result (minus window and door openings) and get required amount rolls Let's look at this in the table using the example of a ten-meter strip, the width of which is half a meter.
Roll size: 10.05 m × 0.53 m = 5.3 m2.
| Room perimeter, m | Wall height 2.0–2.4 m | Wall height 2.4–3.3 m |
| Number of rolls, pcs. | ||
| 6 | 3 | 4 |
| 10 | 5 | 7 |
| 12 | 6 | 8 |
| 14 | 7 | 10 |
| 16 | 8 | 11 |
| 18 | 9 | 12 |
| 20 | 10 | 14 |
| 22 | 11 | 15 |
| 24 | 12 | 16 |
| 26 | 13 | 18 |
| 28 | 14 | 19 |
| 30 | 15 | 20 |
Depending on the standard sizes of wallpaper, the data laid out in the table will change, so only the calculation principle should be taken as a basis.
So that you do not make a mistake in counting the wallpaper that is needed for repairs, you need to correctly calculate its volume. It’s good if there are any leftovers, you can simply use them later.
But if a roll or a few centimeters is not enough, in this case you will have to work hard. And it’s not a fact that you will find exactly the same batch. The canvases may differ in the tone of the pattern, and this is not entirely good.
Anyone can determine the required volume, even without special construction education or construction experience.
Especially if there is no pattern on the wallpaper. You just need to know how to make the correct calculation. And here you need to follow the following sequence:
- First of all, you need to measure the length and height of the walls.
- Now we need to calculate their total perimeter. To do this, add the lengths of two adjacent walls and multiply by 2. Let’s say our walls are 6 and 5 meters, which means the perimeter is 22, i.e. (6+5) x 2=22 m. Standard size The roll is 53 cm wide and 10 m long.
- Wallpaper is easier to calculate based on the number of stripes required. For example, the height of the wall is 2.5 m, therefore, 4 strips will be obtained from the roll. And the total width will be equal to 212 m, i.e. 4 x 53 = 212 cm. Now we perform the arithmetic operation of dividing 2200 cm: 212 cm = 10.38 rolls. We round up, and it turns out to be 11 pieces.
- If you need to wallpaper the ceiling, then the calculation must be made separately.
If you purchased wallpaper with a pattern, then the calculation described above will not be able to take into account rapport, this is the distance between the elements of the pattern.
Such canvases are glued strictly according to the design, without violating the integrity of the overall perception. Usually the rapport is indicated on the packaging, and the larger it is, the higher the wallpaper consumption will be.
But if money spendings don’t scare you, then you need to observe some nuances and do the following:
- Measure the perimeter of the walls and the height of the ceiling using a tape measure. Measure solid walls and the distance under and above windows (doors) separately.
- You need to know the roll dimensions. For example, its width is 0.53 m, length is 10.5 m, repeat is 0.2-0.4 m. Ceilings are 2.6 m. Therefore, from one roll you will get 3 sheets 3 m long = 2.6 + 0.4.
- If you measured the walls in sheets, then you need to divide the number of sheets on the walls by the number of sheets in the roll. And if we used meters in the calculations, then one roll will be equal to 1.59 m. = 0.53 x 3. We divide these numbers by the footage of the perimeter of the walls.
- The pieces you have left over may be suitable for sections of wall above a door or above a window.
Main feature liquid wallpaper is that they have no seams. And this feature gives the room a certain completeness.
This universal finishing material is pleasant to the touch, safe for humans and allows designers to create original and unique projects.
To hang liquid wallpaper in your apartment, you need to determine the number of packages needed to complete the work.
To make the correct calculation, you need to divide the wall area by the consumption of one package. This information is indicated on each package. Usually one package is enough for a surface of 3-5 m2. Let’s say the area of the walls of the room is 40 m 2, and average consumption one package 4 m 2. By dividing 40: 4 we obtained the required consumption - 10 packs.
But when purchasing liquid wallpaper, be sure to buy a quantity of it with a reserve of 1 - 3 packages. Liquid wallpaper can be applied to uneven surfaces with small defects. This means that the consumption of the material used may increase, so take care of this in advance.
