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Wallpaper roll calculator
Estimate full-height strips for one rectangular wall. Use the dimensions on the physical roll label, the tallest measurement on the wall and the trim allowance for both ends combined. The straight-repeat estimate assumes aligned starts.
Worked example
A 325 cm wall needs seven 53 cm strips. At 240 cm high with 10 cm of trim and a 64 cm straight repeat, budget 256 cm per strip. A 1,000 cm roll gives three strips, so allow three rolls before checking motif placement.