About this calculator
Estimate wallpaper rolls from room dimensions and roll coverage.
Pattern repeat can reduce usable coverage, so use manufacturer guidance for patterned wallpaper.
Formula
Rolls = net wall area × (1 + waste%) ÷ usable roll coverage, rounded up.
Example
Enter the usable coverage per roll rather than just roll dimensions when possible.
Accuracy
NUMTX shows the assumptions next to the calculation so you can replace defaults with values that match your situation. For measurements, supplier rates, fees, interest, tax or regulated work, confirm important figures with the appropriate official or professional source.