Estimate how many wallpaper rolls a room will need.
Each roll yields a number of full wall-height strips, and dividing the total wall area by that usable area gives the rolls. Patterned paper can need noticeably more rolls than plain, so counting strips avoids buying yourself into a corner halfway through.
Wallpaper Roll
Strips per roll = roll length / (wall height + repeat); rolls = wall area / usable per roll
Strips per roll = roll length / (wall height + repeat); rolls = wall area / usable per roll Each roll yields a number of full wall-height strips, and dividing the total wall area by that usable area gives the rolls.
Patterned paper can need noticeably more rolls than plain, so counting strips avoids buying yourself into a corner halfway through.
This calculator takes 6 inputs: Wall length, Wall width, Wall height, Roll width, Roll length, Pattern repeat. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.