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Quantity Calculations

Note: We have provided the following to help you calculate the quantities required for borders or wallcoverings. Please take your time and check your measurements and calculations.

Shortcuts to border calculation and wallpaper (3 methods) calculations.

Calculating Border Requirements

Calculations Description of measurement Example
Measurement 1 Measure the total distance you will be applying the border around the room and note this measurement. 13 metres
Measurement 2 Note the length of the border you wish to purchase from the items description. 4.57 metres
Measurement 3 Take the measurement 1 and divide it by measurement 2. 13/4.57=2.84
Measurement 4

Minimum Purchase

Take measurement 3 and round this up to the next whole number.

This is the minimum you can purchase to complete your decorating and does not allow for pattern repeats in the design. For some situations, especially when long continuous sections are required, additional length is required to allow joins to match with a continuous pattern. Continue calculating as follows.

2.84 becomes 3 rolls
Measurement 5 Note the pattern repeat of the border you wish to purchase from the items description. 52cm
Measurement 6 Calculate the extra length required for matching patterns by taking the number of rolls required less one. 3 rolls less 1 rolls = 2 rolls.
Measurement 7

Multiply measurement 6 by measurement 5 in metres not cm.

2 rolls x 0.52cm = 1.04 metres
Measurement 8 Take the original calculation measurement 1 and add measurement 7. 13m + 1.04m = 14.04 metre
Measurement 9 Divide measurement 8 by measurement 2 (length of roll) to get the rolls required. 3.07
Measurement 10 Take measurement 9 and round this up to the next whole number.

This the maximum number of rolls required for one continuous long section with pattern matching when the overlap required to pattern match generates more an average wastage. In this case you could may get away with 3 rolls however depending on where each roll starts you may require 4 to get a total pattern match.

4 rolls


Calculating Wallpaper Requirements

Method 1

This a very basic calculation - useful as an indication for feature walls or where few windows and doors need to be included in the calculation. Does not allow for pattern repeats or the number of complete drops available per roll.

Calculations Description of measurement Example
Measurement 1 Measure the distance in metres around the room 18 metres
Measurement 2 Measure the height in metres from floor to ceiling 2.4 metres
Measurement 3 Multiple measurement 1 by measurement 2 18 x 2.4 = 43.2sq. m
Measurement 4 To determine the number of individual rolls required divide measurement 3 by 5. 43.2sq. m / 5 = 8.64 rolls
Measurement 5 Take measurement 4 and round this up to the next whole number. 8.64 rolls becomes 9 rolls


Method 2

Distance Around
Room in Metres
Height of the room
2.4 metres 2.7 metres
6 3 4
10 5 7
12 6 8
15 8 10
18 9 12
20 10 13
24 12 16

Both methods 1 and 2 estimate the wallpaper required based on averages. If you have many doors and windows, cupboards, etc., you may require less wallpaper. Or with large pattern repeats you may require additional rolls.


Method 3

Allows for pattern repeats

Calculations Description of measurement Example
Determine measurements 1 to 4 before starting:
Measurement 1 Roll Length 10 metres
Measurement 2 Roll width 0.52 metres
Measurement 3 Pattern Repeat 0.64 metres
Measurement 4 Measure the height in metres from floor to ceiling. 2.7 metres
Measurement 5 Measure the distance in metres around the room. 18 metres
Measurement 6 How many pattern repeats per drop?
Calculate room height divided by the pattern repeat.
Or measurement 4 divided by measurement 3.
2.7m/0.64m = 4.22
Measurement 7 Take measurement 6 and round this up to the next whole number. 4.22 become 5
Measurement 8 How many pattern repeats from a roll?
Calculate the roll length divided by the pattern repeat.
Or measurement 1 divided by measurement 3.
10 metres/ 0.64m = 15.63
Measurement 9 How many drops per roll?
Calculate the number of pattern repeats per roll divided by the number of pattern repeats per drop.
Or measurement 8 divided by measurement 7.
15.63 / 5 = 3.13
Measurement 10 Round down to calculate the number of whole drops available per roll. 3.13 becomes 3 drops per roll.
Measurement 11

How many drops per roll?
Number of drops required divided by the number of drops from each roll.
Or measurement 5 divided by measurement 2.

18 metres / 0.52m = 34.62 drops.
Measurement 12 Take measurement 11 and round this up to the next whole number. 34.62 drops becomes 35 whole drops.
Measurement 13 How many rolls?
Calculate the number of drops required divided by the number of drops available from each roll.
Or measurement 12 divided by measurement 10.
35 /3 = 11.67 rolls
Measurement 14 Take measurement 13 and round this up to the next whole number. 12 rolls of 10m by 52cm wallpaper required.

While we have tried to be as helpful as possible to ensure the above calculations methods are correct please double check your measurements and calculations.