Collection: How To Calculate Number of Wallpaper Rolls Needed

Each of our Wallpapers are 10 Metres long, with a width of 52cm (butt fit).
The pattern repeat is the distance between two matching design elements on a roll of wallpaper.
This distance helps to decide how many rolls you will need. The pattern repeats for our designs are stated on each individual product page. 
 
1. Measure the Wall
First, you will need to carefully measure each wall that you want to paper. Measure the width and the height in centimetres. If there are multiple walls with the same heights, you can add the widths together - if they are different heights, you will need to work out one wall at a time.
Example:
Wall A) 450cm width x 240cm height.
Wall B) 360cm width x 200cm height

2. Divide to work out the Drops
Now divide your wall widths by your wallpaper width (52cm) to work out how many drops you need.
Example:
Wall A) 450cm / 52cm = 8.65. Always round up to a whole number = 9 drops.
Wall B) 360cm / 52cm = 6.92. Round up = 7 drops.
 
3. Multiply
Next you need to multiply the number of drops by the wall height.
Note this value down – it is the drops x height value.
If multiple walls, as in this example, add these values together to get the total drops x height value;
Example:
Wall A) 9 drops x 240cm height = 2160cm.
Wall B) 7 drops x 200cm height = 1400cm.
2160 + 1400 = 3560 cm

4. Pattern Repeat
To work out the pattern repeat allowance, you need to add a pattern repeat allowance for each drop,
apart from the first one. So, take the number of drops you calculated for each wall and deduct 1 drop;
Example:
Wall A) 9 drops – 1 = 8 pattern repeats.
Wall B) 7 drops -1 = 6 pattern repeats.
Use the pattern repeat of your chosen design to work out the additional value(s) required; Here we
will use 26cm as an example: 
Example:
Wall A) 8 x 26 cm = 208 cm
Wall B) 6 x 26 cm = 156 cm
Make a note of this value down as the Pattern Repeat value.
If multiple walls, as in this example, add these values together to get the total Pattern Repeat value:
Example:
208 + 156 + 364 cm

5. Add Your Totals Together
Add your totals together which will tell you the total meterage you require to cover your walls.
Total drops x height + Total pattern repeat value
Example:
3560 + 364 = 3924 cm
Divide this number by the roll length of 1000 cm (10 Metres) to work out how many rolls you need.
Round up to the next whole number for the number of required rolls.
Example:
3924 / 1000cm (10 metres) = 3.92. Part rolls are not available, so round this up to 4 rolls required.