Why is it important to calculate wallpaper in advance?
Wallpaper comes in different widths, lengths, and pattern repeats. Even small mistakes in measurement can change the number of rolls required.
Accurate calculation helps you:
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avoid unnecessary spending,
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prevent running out mid-project,
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ensure all rolls come from the same production batch.
Manual calculation (step-by-step)
1. Measure the total width of the wall(s)
Measure every wall you plan to cover and add the widths together.
2. Divide by the wallpaper width
Standard wallpaper width is 53 cm, but many designs come in 70–106 cm widths.
3. Determine how many drops you can cut from one roll
This depends on the wall height and the roll length.
4. Consider pattern repeat (rapport)
If the pattern needs to match, add 10–30 cm extra per strip.
5. Calculate the total number of rolls
Divide the number of needed strips by the number of strips per roll.
If this feels complicated — it’s normal.
That’s exactly why the Majidi Design Wallpaper Calculator exists.
How to use the wallpaper calculator (fast & accurate)
You can use the free online calculator here:
Enter the following:
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wall height
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wall width
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wallpaper width
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roll length
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pattern repeat
The calculator will automatically provide:
✔ how many strips you need
✔ how many strips fit into one roll
✔ the exact number of rolls you must buy
✔ recommended extra allowance
Tips for buying the right amount of wallpaper
1. Always order +1 extra roll
Especially important for patterned designs.
2. Check the batch number
If you buy later, rolls from another batch may differ slightly in colour.
3. Use the calculator + expert support
If you’re unsure, the Majidi Design team can double-check your measurements.
Summary
Calculating wallpaper doesn’t have to be complicated. With the Majidi Design online Wallpaper Calculator, you can determine the exact number of rolls in just a few seconds.
Calculate the required quantity!