Wallpaper Calculator

The key to successful wallpapering is the Pattern Match and Waste Factor. There are three types of matches: Random Match (the easiest, no repeat needed), Straight Match (the pattern lines up horizontally), and Drop Match (the pattern shifts vertically at each seam). A "Drop Match" is the most beautiful but also the most wasteful; you may lose 20% or more of every roll just trying to align the image. Our calculator accounts for the "Repeat" distance to ensure you don't come up short on your last wall. Another vital consideration is the "Double Roll" vs "Single Roll" terminology. Most wallpaper is priced by the "Single Roll" but only sold in "Double Roll" bolts. This is an industry standard that causes immense confusion. Always check the total square footage listed on the bolt you are buying and compare it to our "Total Area Needed" result.

Don't overlook the Wall Preparation. Wallpaper is only as good as the surface beneath it. You must "Prime" the wall with a specialized wallpaper primer (like ShieldZ) before hanging. This creates a "slip" that allows you to move the paper into place easily and ensures the paper will be removable years later without damaging the drywall. Additionally, focus on the Adhesive Type. Some papers are "Pre-Pasted," while others require you to apply paste to the wall or the paper. Non-Woven papers are the most popular today because they are "Paste-the-Wall," which is much cleaner and faster for DIYers. Our tool helps you with the quantity, but choosing a high-quality "Heavy Duty" paste is what prevents the seams from peeling over time. Finally, remember to buy one "Extra Roll." Even with perfect math, accidents happen—a roll can be damaged during trimming or a mistake can be made in the pattern alignment. Having that extra roll from the same dye lot is the best insurance policy for your project.