WALLPAPER ROLL PLANNING
Why the strip count
comes before the roll count.
Wallpaper is cut into lengths before it covers a wall. A roll’s total area can look sufficient while its length cannot supply enough full-height drops.
Start with one wall height
Measure the vertical height you will paper, then the width of every wall. Paperroll uses one shared height. Add different widths as separate rows and use quantity for matching walls.
If your walls need different cut lengths, make separate plans and add their roll orders. Those plans do not share offcuts. Keep different wallpaper products and designs separate too.
Round each wall’s drops upward
Divide a wall’s width by the roll width and round upward. A 400 cm wall with 50 cm-wide paper takes eight drops. A 401 cm wall takes nine. Paperroll starts every wall with full-width strips and does not reuse a narrow strip from one wall on another.
Include your total trim allowance
The trim input is the total added to one drop. If you choose 5 cm at the top and 5 cm at the bottom, enter 10 cm. A 240 cm wall then starts with a 250 cm cut length.
Account for the repeat, with limits
For a positive repeat, this simple model rounds the cut length upward to a whole repeat multiple. With the 250 cm cut above and a 64 cm repeat, the model uses 256 cm. It does not plan the first pattern alignment on a roll or the staggered cuts of an offset pattern.
Graham & Brown’s measuring guide distinguishes free, straight and offset matches and explains why the match type and repeat affect the amount needed. Follow your own product’s matching instructions; a repeat number alone does not describe every design.
Count the full cuts that fit
Divide roll length by cut length and round downward. A 1,000 cm roll provides four 250 cm drops, but only three 256 cm drops. The remaining short tail is not reused in this model. If one full cut exceeds the roll length, the planner shows an error.
One 400 cm-wide wall needs eight 50 cm-wide drops. At 250 cm per cut and 1,000 cm per roll, that is two rolls. Changing only the repeat to 64 cm makes each cut 256 cm: three cuts per roll, so the model’s order becomes three rolls.
Openings and extra rolls
Paperroll does not subtract doors or windows. An area deduction does not establish which interrupted strips or offcuts can actually be reused. Enter any extra whole rolls you choose separately; they are added after the base whole-roll count.
Corner overlaps, initial pattern positioning, trimming losses beyond your entered allowance and nonstandard products need a product-specific cutting plan. The displayed minimum is a minimum within these assumptions, not a guaranteed installation quantity.
Your own quote
Enter an actual price per roll to calculate whole rolls × price, plus delivery. Prices support two decimal places. A blank price remains unknown; a quoted zero remains zero. All example measurements can be replaced.
Manufacturer reference checked 11 October 2026. Original examples; no manufacturer affiliation.
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