The first question that arises from the owners who decided to paste over the walls with wallpaper is “How many of them do you need?” The question is really important. Our tips site will give you a simple and understandable scheme, guided by which you can easily and as accurately calculate the number of wallpapers for a particular room..
The first step is to determine the perimeter of the room. Remember elementary school math? The formula for calculating the perimeter is simple: (width + length) · 2. This is if your opposite walls are the same, that is, the room is strictly rectangular, which most often happens. If the room has a complex shape, the walls are broken and of different lengths, then the perimeter formula will look different: A1 + A2 + A3 + A4. That is, each wall will have to be measured separately, and then everything will have to be folded to get the perimeter. In the same way, the perimeter is calculated if there are niches or protrusions in the room..
Important! Experts advise to measure the length of the wall to calculate the perimeter of the floor.
Let’s say we have a standard rectangular room with walls of 3 and 5 meters. The perimeter is 16 meters. Now let’s calculate how many stripes of wallpaper we need. The roll width must be indicated on the packaging! It can be 50 or 100 centimeters. By the way, meter wallpapers are increasingly popular today – yes, it’s a little more difficult to glue them, but the process itself is fast.
So, if we have a roll width of 50 centimeters, then we need 16: 0.5 = 32 strips of wallpaper. With a meter width, respectively, 16 lanes.
Now we need to find out how many stripes we get from one roll of wallpaper. For this we need two indicators – the length of the wallpaper roll itself and the height of the room. If there are no problems with the first indicator, it is also written on the packaging, then questions arise with the second.
Yes, you can easily measure the height of a room with a tape measure. Let’s say you got 2.5 meters. You need a 10 cm margin for the bottom and top trims of the strip. But if the wallpaper with a pattern, a pattern that needs to be selected, you should also take into account the rapport.
Important! Rapport is the step of repeating the pattern. It is indicated on the packaging. The rapport can be 20, 25, 35 and even 60 centimeters.
The rapport can be without offset and with it. For example, in order for the patterns of the stripes to match, each next cut off canvas will have to be glued, shifting upwards by half the rapport. In this case, this value must also be added to the height of the room..
Designation of rapport on wallpaper
Let’s take the most difficult option – a rapport of 50 centimeters, an offset of 25 centimeters. Remember that we have a ceiling height of 2.5 meters. 250 + 50 + 25 + 10 (for trimming) = 335 cm height of one strip.
Standard roll lengths are 10 and 15 meters. Divide 10 meters by 3.35 = 2.985, round up to 3. That is, from one roll 10 meters long, we get only 3 strips. We need 32 strips 50 centimeters wide or 16 strips 1 meter wide. Thus, for a room with a perimeter of 16 meters, we need 32: 3 = 10.66, that is, 11 rolls. Or 16: 3 = 5.33, that is, 6 whole rolls of meter wallpaper.
If there is no rapport, wallpaper with a chaotic pattern or a pattern that does not need to be selected, then the situation is simplified and the wallpaper consumption is much less. In this case, we simply divide the length of the roll by the height of the room plus the margin for trimming.
Wallpaper with pattern selection
When asked whether it is necessary to subtract the sizes of windows and doors from the perimeter of the room, experts answer – not worth it! Let there be a reserve. An exception, of course, needs to be made for a panoramic window with a large area. Or a double sliding door.
In addition, the portal has already written what materials should be taken with a margin. Take one more roll of wallpaper than you need! Let it be in case of marriage or a damaged strip. In addition, the stock will come in handy if you need to re-glue a couple of strips in the future..
Important! Now there are many online calculators on the network that allow you to calculate the number of wallpapers per room. But you shouldn’t blindly trust them. Carry out the calculations yourself, according to our formulas, and then check the result with a calculator on the Internet.
How to calculate the number of wallpapers per room
This WordPress post outlines an efficient and easy-to-follow process for calculating the number of wallpapers required for any given room. By following the detailed instructions outlined in the post, homeowners or design professionals can accurately determine the number of wallpapers needed for any space, allowing them to plan and budget for the project accurately. The post also provides helpful information on the types of wallpaper available and the associated thickness and width of each, allowing readers to make the best decisions for their particular requirements.
Renovation and finishing 
Can you please provide a formula or method to calculate the appropriate number of wallpapers needed for a room?
Could you please explain the steps to calculate the number of wallpapers required per room?
To calculate the number of wallpapers required per room, you will need to follow these steps:
1. Measure the height and width of each wall in the room where you plan to install the wallpaper.
2. Calculate the square footage of each wall by multiplying the height by the width.
3. Add up the square footage of all the walls in the room to get the total square footage that needs to be covered.
4. Determine the square footage coverage of a single roll of wallpaper. This information is typically provided on the wallpaper packaging or by the manufacturer.
5. Divide the total square footage of the walls by the square footage coverage of a single roll of wallpaper to determine the number of rolls required.
6. Round up to the nearest whole number to ensure you have enough wallpaper to cover the entire room without running out.
By following these steps, you can accurately calculate the number of wallpapers required per room to ensure a proper and professional-looking installation.
Could you please explain the method or formula to calculate the number of wallpapers required per room? I’m interested in understanding the process and ensuring I have the right amount for my upcoming project. Thank you!