## 5 Steps To Quantifying Like A Pro

Accurate quantifying is the vital 1st step of every successful wallpaper installation

Mick Wells

This guide outlines the system we use to calculate how many rolls of patterned paper to order for our clients – and it works without fail! So if followed correctly these steps will help you order accurate quantities time and time again!

**STEP 1:** WALLPAPER VITAL STATISTICS

**STEP 2:** WALL HEIGHT AND WIDTH

**STEP 3:** NUMBER OF DROPS PER ROLL

**STEP 4:** NUMBER OF DROPS PER ROOM

**STEP 5**: PULL IT ALL TOGETHER

Keep scrolling for full instructions…

**STEP BY STEP INSTRUCTIONS:**

Please note that figures in **bold **refer to figures determined before applying the below process. Figures in *italics *are calculated within this guide.

**Step 1: Note**** down the vital statistics of the chosen wallcovering:**

**Width:____**

**Vertical (pattern) repeat:____**

**Length of roll:____**

**Step 2: Note**** down the wall height and width (total of whole room) **

**Wall height:____**

**Wall width:____ **

**Step 3: Determine the number of drops per roll **

A: Divide the **wall height **by the **vertical repeat **

B: Round up figure to determine correct *number of repeats *

C: Multiply *number of repeats *by **vertical repeat **figure to determine *length of one drop *

D: Divide the **length of roll **by *length of one drop *to get *number of drops per roll *

E: Write down the *number of drops per roll *

**Step 4: Determine the number of drops required for the room **

A: Double check **wall width **

To make things easy, unless there is an excessive number of windows and doors, measure them like they are part of the straight wall. If the windows or doors have reveals (must be wrapped in) it is essential that you take them as being part of the wall because you will use the same amount of paper because of splicing etc.

You can take away the doors and windows if there are a lot or you are worried about cost but be very careful, it’s better to have a little more than running short.

Double-checked **wall width **____

B: Divide **wall width **by **wallpaper width **

C: Round up to determine correct *number of drops required *for the room.

*Number of drops required ____*

**Step 5: Determine the number of rolls required **

**A: Divide the number of drops required by number of drops per roll **

**B: Round up to next full roll. This is your order quantity. **

**An example:**

**Step 1: **

Vertical repeat = 65cm straight match

Length of roll = 10m (1000cm)

**Step 2: **

Wallpaper width = 52cm

Wall height is 265cm

**Step 3: **

A: Divide the wall height by the vertical repeat – 265 / 65 = 4.07

This means there are 4.07 vertical repeats in the wall height.

B: Round up: The number of vertical repeats in the wall is 4.07. Allowing for wastage and to get a perfect match on the next drop this must be rounded up. So the number of repeats = 5.

C: Multiply the number of repeats by the vertical repeat. 5 x 65cm = 325cm

This means that the length of 1 drop taking into account wastage and being able to get a perfect match on the next piece = 325cm.

D: Divide the Length of roll (1000am) by Length of 1 drop (325cm)

E: The number of drops per roll is 3

**Step 4: **

A: Width of room = 15.8M (1580cm)

B: Divide wall width by wallpaper width. 1580 cm / 52cm = 30.4

C: Round up to 31 drops per room

**Step 5: **

A: Divide the number of drops required by number of drops per roll. 31 / 3 = 10.3 B Round up to next full roll. 10.3 = 11 rolls

Order quantity = 11

Got a project you need help with? Don’t hesitate to contact us enquiries@wells-interiors.com / 020 3289 0979