The number of wallpapers needed depends on the dimensions of wall and the wallpapers. The given steps will help you decide the number of wallpapers required to cover the wall.
First, measure the length and height of the wall where you wish to apply the wall sticker.
Let us say, for example, that the dimensions of wall are 10 feet x 10 feet ( Lx H) which is same as 300 x 300 cms.
These wallpapers come in rolls of different sizes. The most common is 45 cms x 500 cms.
To calculate the number of rolls needed, we can divide the wall surface are by the wallpaper area.
This gives Surface Area/ Wallpaper area i.e. (300 x 300) / (45 x 500) which gives 4.
It is always better to have 1 wallpaper extra.
So, 5 wallpapers will be required to cover a wall of 10 x 10 feet.
You can find the required rolls for any wall dimensions using this idea.