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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.
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 |
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 |
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.
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? |
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. |