The number of rolls of wallpaper that you need is dependent on the height and width of the walls, the length, and width of the roll of wallpaper and the possible pattern repeat. For a wallpaper type with a pattern, the calculation for the number of rolls is slightly different than for a wallpaper type without a pattern. For both options, we explain the calculation below with an example.

### You Have The Answer In A Few Simple Steps

How much wallpaper you need depends on a few things. Whether your wallpaper has a pattern or not a pattern. And whether the wallpaper is sold per roll or per meter. Also, there is a wallpaper that has a half-staggered pattern. Also called ‘half drop’.

TIP: write down in advance how high and wide the wall to be wallpapered is. Also, note how wide and long the roll of wallpaper is and any pattern repetition.

### Calculate The Number Of Rolls

Note: the wallpaper calculator gives a good indication of how many rolls you need. However, it remains an estimate.

Also, the calculator does not take into account wallpaper that has a half-staggered pattern. Also known as a half drop.

Do you want to know how many rolls you need? Then use the calculation examples below.

Or send us an email with the dimensions of the wall (s). We are happy to calculate it for you. ( Unfortunately, it is not possible to pass it on by phone and have it calculated to avoid misunderstandings.)

### Calculate Wallpaper With A Pattern

**In the following example, the wall is 420 cm wide and 270 cm high.**

The roll of wallpaper is 53 cm wide and 10 meters long. The pattern repeat is 32 cm.

**Step 1: Calculate the number of required strips of wallpaper**

Measure the width of the wall or walls.

Divide the width of the wall by the width of the roll. And round up the result.

This gives you the required number of jobs.

420 cm (wall width): 53 cm (roll width) = 7.92 lane.

So, rounded up, you need 8 jobs.

**Step 2: Calculate the number of patterns per roll of wallpaper**

Divide the length of the roll by the pattern repeat. And round the result down.

This gives you the number of cartridges per roll.

10 meters (roll length): 32 cm (pattern repeat) = 31.25 patterns

In this example, you get 31 patterns from 1 roll of wallpaper.

**Step 3: Calculate the number of patterns per lane**

Divide the height of the wall by the pattern repeat.

And round up the result.

270 cm (wall height): 32 cm (pattern repeat) = 8.4 pattern

Rounded up, this is 9 patterns per lane.

**Step 4: The number of jobs you get out of a roll**

Divide the number of patterns per roll (outcome step 2) by the number of patterns per lane (outcome step 3).

And round the result down.

31 patterns (on the roll): 9 patterns (per lane) = 3.44 lanes

This means you get 3 lanes from a roll of wallpaper.

**Step 5: The required number of roles = outcome**

We are now almost done calculating because we have all the necessary information.

You need 8 strips of wallpaper for the entire wall (Outcome Step 1).

You get 3 jobs from 1 roll of wallpaper. (Outcome Step 4)

Divide the outcome of Step 1 by Step 4 and round up. This gives you the required number of rolls.

8 lanes (total number of lanes): 3 lanes (number of lanes per roll) = 2.66 roll

**Result:** To be able to stick 8 lanes you need 3 rolls of wallpaper.

Calculate the number of rolls with a half-offset pattern ( half drop )

**In the following example, the wall is 420 cm wide and 270 cm high.**

The roll of wallpaper is 53 cm wide and 10 meters long.

The pattern repeat is 32 cm, half offset. Also called ‘half drop’.

**Step 1: Calculate the number of required strips of wallpaper**

Measure the width of the wall or walls.

Divide the width of the wall by the width of the roll. And round up the result.

This gives you the required number of jobs.

420 cm (wall width): 53 cm (roll width) = 7.92 lane.

So, rounded up, you need 8 jobs.

Step 2: Calculate the number of patterns per lane

Divide the height of the wall by the pattern repeat.

And round up the result.

270 cm (wall height): 32 cm (pattern repeat) = 8.4 pattern

Rounded up, this is 9 patterns per lane.

**Step 3: Draw the lines on a piece of paper.**

The wallpaper in this example has a half-staggered pattern. This means that every 2nd lane needs an extra pattern.

If the pattern has a somewhat larger pattern, you can also count with half a pattern instead of an entire pattern extra.

In this example, we conveniently add a whole pattern to every 2nd lane.

What can help us to make a simple sketch on which you draw the number of jobs?

Above the first lane, you indicate how many cartridges you need. In this example, that’s 9.

On every 2nd lane, you add one pattern (or a half pattern, if it is a large pattern).

In this example, every 2nd lane has 10 patterns.

And so you complete the list on your paper.

**Step 4: Calculate the number of cartridges per roll**

Divide the length of the roll by the pattern repeat. And round the result down.

This gives you the number of cartridges per roll.

10 meters (roll length): 32 cm (pattern repeat) = 31.25 patterns

In this example, you get 31 patterns from 1 roll of wallpaper.

**Step 5: The number of jobs you get out of a roll**

Divide the number of patterns per roll (outcome step 2) by the number of patterns per lane (outcome step 3).

And round the result down.

31 patterns (on the roll): 9 patterns (per lane) = 3.44 lane

31 patterns (on the roll): 10 patterns (per lane) = 3.1 lane

For both even and odd lanes, you have 3 jobs from a roll of wallpaper.

The sketch you made in Step 3 helps you visualize how many patterns are in orbit. And how many jobs you need.

Depending on the situation, try to get as many jobs out of a roll as possible. A combination of 3 x 10 cartridges is possible in this example. But sometimes in your case, it can be good that you get different lengths out of a job.

The starting point is Step 6, see below.

**Step 6: The required number of roles = outcome**

You need 8 strips of wallpaper for the entire wall (Outcome Step 1).

You get 3 jobs from 1 roll of wallpaper. (Outcome Step 5)

Divide the outcome of Step 1 by Step 5 and round up. This gives you the required number of rolls.

8 lanes (total number of lanes): 3 lanes (number of lanes per roll) = 2.66 roll

**Result:** To be able to stick 8 lanes you need 3 rolls of wallpaper.

Do you find it difficult? First, go through the example of wallpaper with a straight match. This contains a pattern in which the pattern connects directly to each other.

When you understand that, it is a small step to calculating wallpaper with a ‘half drop’