Wallpaper Roll & Pattern Repeat Estimator
Calculate exact wallpaper single and double rolls, pattern repeat waste, vertical drops, and adhesive paste needed based on wall dimensions.
Calculated Results
Frequently Asked Questions
Why is wallpaper sold in 'double rolls' in the US?
In the US, wallpaper is priced by the single roll but almost universally packaged and shipped as continuous 'double rolls' (measuring roughly 20.5 inches wide by 33 feet long, totaling ~56 square feet) to minimize scrap waste between cuts.
What is pattern repeat and how does it create waste?
If a wallpaper design has a 21-inch drop pattern repeat, every vertical strip must be shifted up or down until the pattern aligns with the previous strip. This trimming creates 15% to 25% inevitable scrap waste compared to non-patterned textures.
Should you deduct windows and doors when calculating wallpaper?
Wallpaper installers recommend NOT subtracting doors or windows unless they are large patio sliding doors or picture windows exceeding 40 square feet. The small pieces left over from window cutouts are frequently unusable due to pattern matching.
Why is it critical to order all wallpaper from the same dye lot?
Wallpaper rolls produced in different factory batches (dye lots) have subtle chemical shade variations that become glaringly visible when hung side-by-side under daylight.