02 / HOME & DIY
Wallpaper calculator.
Work out strips, rolls and pattern-repeat allowance.
Preparing your workspace…
Questions & answers
Should I subtract doors and windows?
This calculator uses full wall widths without deducting openings. It plans full-width vertical strips and does not reuse offcuts, so openings can leave spare material. Check the actual cutting plan before buying.
Does this work for drop-match wallpaper?
No. This version supports free-match and straight-match wallpaper. Drop-match and A/B designs need a different cutting plan. Use the match type and repeat printed on your chosen roll.
Why can pattern repeat increase the roll count?
The calculator adds total trim to the wall height, then rounds that strip length up to a whole straight pattern repeat. Longer strips can reduce the number cut from each roll. Walls of different heights need separate calculations.