Our Designers want to ensure you select the best wallpaper for the job so they have written the following guide to ensure you will be overjoyed with your wallpapering results!


Note - use consistent units throughout the calculation i.e. either cm or m. Do a single calculation for each wall you are papering to find out the number of rolls required and then add each number of rolls required per wall together. 

1. Measure the width and height of the wall requiring wallpaper. 

2. To find out the number of drops required, divide the width of the wall by the width of the wallpaper (usually 52cm) and round up to the nearest whole number.

3. To find the length of each drop, take the height of the wall, add 30cm for wastage and an additional 10% for any pattern repeat and/or pattern match.

4. To find out how many drops can be achieved per roll, divide a roll length (usually 1000cm) by the length of each drop.

5. To find out the number of rolls required for the wall, divide the number of drops required by the number of drops per roll and round up to the nearest whole number.

6. Always double-check the quantity required with your Decorator before ordering.

Wallpaper Calculator



1. Wallpapering a wall measuring 400cm x 250cm (width x height) 

2. 400cm/ 52cm = 7.69 = 8 drops required

3. (250cm + 30cm) +10% = 308cm drop length

4. 1000cm/ 308cm = 3 drops per roll

5. 8 drops are required, therefore 8/3 = 2.6 rolls = 3 rolls required


Understanding the different types of wallpaper will ensure you select a paper suitable for the job, each wallpaper states recommended cleaning and durability.  It is, for example, obvious to use more durable, hardwearing wallpaper in a busy hallway, than a rarely used guest bedroom!  For bathrooms and utility areas the best type of wallpaper to use is vinyl, but no wallpaper is recommended to come into direct contact with water.

Designer Wallpaper

Zoffany Ivy Leaf Wallpaper Christian Lacroix Wallpaper Pantigre GP & J Baker Wallpaper - Sundra


Wallpaper Application

‘Paste the wall’ is as it sounds, where the paste is directly applied to the wall before the wallpaper is hung. This is a much quicker method of hanging wallpaper, but it is not available for traditional papers as these expand when wet so must be left to soak before hanging.

'Paste the paper' is the application method whereby the paste is applied to the reverse of the wallpaper before hanging. This method involves a process called “booking” which refers to the activatation of the paste that occurs whilst the paper is resting before hanging the strip. 

Please refer to the individual wallpaper for the application type.

When calculating the wallpaper quantity, if you have selected a patterned paper it is important to understand that pattern repeat and pattern matching are two different things:


VERTICAL PATTERN REPEAT (PR) = One complete PR is the distance of one full repeat of the design; it is identified on each roll of wallpaper

PATTERN MATCHING = Some patterns do not run straight horizontally; therefore pattern matching needs to be taken into account





Patterns match on adjoining drops, no wallpaper lengths are required


Patterns match no matter how drops are positioned next to each other (eg a striped pattern), no additional length required


REVERSE HANG ALTERNATIVE LENGTHS Used for a striped wallpaper to ensure visual effects such as shading aren’t apparent, no additional length required 


Written on the wallpaper roll as either a quarter, half, a third or three-quarter drop match. For example, a three-quarter drop pattern repeat requires three-quarters of the pattern repeat to be included in every even numbered drop

OFFSET MATCH  Written on the wallpaper roll: ie 26cm, this means the point the wallpaper drops match from left to right is every 26cm therefore an additional 26cm needs to be included for every even numbered drop

 Wallpaper Match Types  Zoffany Kalamkari Wallpaper Baker Lifestyle Comber Wallpaper Zoffany Fiamma Designer Guild Yukata Heather Christian Lacroix Canopy Wallpaper Match Types Definition


Always read the instructions first, they do vary for different wallpapers!!

Lining paper (cross lining/horizontally hung) is a great idea to hide poor quality walls, lumps and bumps!

If using a dark coloured paper, painting the wall the same colour behind the joins and/or colouring the end of the paper with a toning water based felt tip pen will avoid unsightly lines.

It’s helpful to pencil the hanging order on the reverse of each wallpaper drop to be hung before starting to avoid confusion!

Always use a high quality adhesive; all wallpaper brands supply them, so you know it will work perfectly with the same branded wallpapers! 

Please note the information provided here is correct to the best of our knowledge and experience, no liability whatsoever can be accepted on the basis of the information supplied herein.