Wondering how a lot wallpaper you want? It is at all times finest to enable for a little bit further, partly in case a strip tears by chance but additionally in case you’ll be able to’t get any extra wallpaper in the identical batch which might imply one strip or one roll would look totally different.
All it takes is a little bit time and endurance, a metallic measuring tape, a pad and pencil and a calculator.
Here’s how to work it out:
1. Let’s take a single clean wall first with a wallpaper that has a plain design.
Measure the width of the wall and the peak from high of the skirting to the ceiling.
e.g. 178 inches broad and 104 inches excessive.
Most wallpapers are 20.5 inches in width (so double test the width). Divide 178 by 20.5 (the width of the wall by the width of the wallpaper to work out what number of strips you want) = 8.6 = 9 strips of wallpaper.
The rolls have a tendency to be 11 yards lengthy, so divide 396 by 104 (the peak of the wall) = 3.8. Now, if you don’t need to havehorizontal joins alongside your wall, so this implies you’ll solely get Three full strips per roll.
As you want 9 strips @ Three full strips per roll, you want Three rolls of wallpaper.
2. Let’s calculate wallpaper for a single clean wall with a wallpaper that has a repeat design.
Imagine the wall is 155 inches broad, 102 inches in top.
The wallpaper is 20.5 inches broad, 396 inches in a roll (which is commonplace) and the repeat is 19 inches.
Divide 155 by 20.5 to work out the variety of strips wanted = 7.56 = Eight strips of wallpaper.
Divide the peak by the repeat, 102 divided by 19 = 5.36 which signifies that 6 repeats is required in every strip of wallpaper so that you now want to multiply 19 x 6 = 114 inches.
(Each strip of wallpaper should be 114 inches cm and there can be 12 inches of waste on every strip.)
Divide the size of the roll by the ‘new’ top, 396 divided by 114 = 3.47 which signifies that there are Three full strips in every roll. (half strips can be utilized above doorways and above and beneath home windows however not in an unbroken wall).
Hence as you want 7 strips of wallpaper and there are Three full strips in every roll, you want Three rolls of wallpaper.
3. To calculate wallpaper for a full room with doorways and home windows:
Measure the peak and width of the complete room (including collectively the widths of all 4 partitions). While you might assume you can subtract the width of the doorways and the home windows, you’ll be able to’t! The motive is the a part of a full strip (lengthways) could also be used beside the door and the waste from that can’t be used. Hence, I’d advise solely subtracting half the width of the doorways and home windows (and keep in mind you will have wallpaper above and beneath the window).
Full width of room = 483 inches
Height = 104 inches
Repeat of wallpaper = 22 inches.
Divide the peak by the repeat, 104 divided by 22 = 4.72 so 5 repeats are wanted. 22 x 5 = 110 inches per strip.
Divide the complete width of the room by the width of the wallpaper, 483 divided by 20.5 = 24 strips.
If there are 2 doorways within the room, I’d subtract one strip.
I’d solely subtract one strip of wallpaper for each 2 or Three home windows within the room – higher to err on the aspect of warning. It is feasible to work out precisely how a lot wallpaper is require however you would wish to know your start line within the room and the precise measurements above and beneath the window
Divide 396 by 110 to work out what number of strips you’re going to get out of every roll = 3.6 which is Three full strips. Part of the rest may very well be used above doorways and above home windows. Hence, for a room with 2 doorways and three common sized home windows, I’d order order 22 strips for this room (24 minus 2) which is Eight rolls.
If doubtful, double test utilizing a wallpaper calculator which is commonly accessible on websites that promote wallpaper or test along with your decorator.
I hope that helps you to calculate what number of rolls of wallpaper you will have on your adorning.