Calculate exactly how many wallpaper rolls you need for any room. Enter dimensions, doors, windows, and wallpaper specs to get the precise roll count. Free online tool.
This free online wallpaper calculator helps you estimate exactly how many rolls of wallpaper you need for your room. Simply enter your room dimensions, the number of doors and windows, your wallpaper roll specifications, and pattern repeat. The calculator accounts for openings, pattern matching waste, and rounds up to whole rolls so you know how much to buy.
The calculator provides a close estimate based on standard dimensions. Actual needs may vary depending on wall irregularities, pattern complexity, and your skill level. Always round up and buy extra rolls.
Pattern repeat is the vertical distance before the wallpaper pattern repeats. Larger repeats require more waste when matching patterns at seams, increasing the total number of rolls needed. Solid colors have 0 repeat.
We recommend buying at least 10% more than calculated — typically 1–2 extra rolls. This covers mistakes, pattern matching issues, and provides spare material for future repairs.
Yes! Simply enter the dimensions of the accent wall only (set other walls to 0 or ignore them). The calculator will give you the exact rolls needed for that wall.