Wall area, in square feet Number of doors Number of small to medium-sized windows (10 to 14 square feet) Number of large windows (up to 20 square feet) Is the pattern "dropped"? (check if yes) Number of American Rolls: Number of European Rolls:
Please note: For your convenience, this calculation has been rounded up slightly.
Important reminder: Every effort has been made to ensure the accuracy of this calculation. But before purchasing materials for any project, please check amounts with your suppliers or contractors.
For wallpaper borders, simply measure the length needed and divide by the footage of the border roll to determine the number of rolls. This estimator will help you assess how much wallpaper you'll need.
A single "American" roll covers 36 square feet, while a single "European" roll covers 25 square feet. "Double" rolls cover twice the area. In this calculator, we count an American roll as 30 square feet and a European roll as 18 square feet, to account for waste.
A few tips: Wallpaper with a "straight" pattern is easy to install and has limited waste. When installing wallpaper with a "dropped pattern," you must align adjacent panels vertically, which takes more time and produces more waste.
Buy a roll or two more than you think you'll need, in case you make a mistake. Otherwise, if you purchase new rolls, they may not be from the same dye lot.