Wallpaper Calculator
Estimate wallpaper rolls for a rectangular wall area.
How to Use the Wallpaper Calculator
Enter wall dimensions, roll dimensions and pattern repeat details to estimate the number of wallpaper rolls required.
Practical Example
A wall area of 30 m² may require more than the simple area ratio suggests because rolls must be cut into full-height strips and patterns may need alignment.
Factors That Affect the Result
Ceiling height, roll width, pattern repeat, matching style, doors, windows and trimming waste can all change the final roll count.
Frequently Asked Questions
Does pattern repeat increase waste?
Yes. Larger repeats can require extra material.
Should I subtract windows?
Large openings can be subtracted, but some extra material is still useful.
Should I round up rolls?
Yes. Wallpaper is purchased in whole rolls.
Related Tools
Wallpaper Estimation Tips
Measure wall width and height carefully, subtracting large openings only when appropriate, and check the coverage stated on each wallpaper roll. Pattern repeats and matching can increase waste, so add extra material for trimming and alignment. Rooms with many corners, doors or windows may require more rolls than a simple area calculation suggests. For patterned wallpaper, use the manufacturer’s repeat specification and round up to whole rolls before purchasing.