Wallcovering Roll Takeoff With Pattern Repeat
The rolls of wallcovering from the wall perimeter, height, and pattern repeat.
Example
You enter
- Wall run to cover (in, less openings) 624
- Wall height (in) 108
- Roll width (in, US ~27 / Euro ~20.5) 20.5
- Roll length (in, US double-roll bolt ~324 / Euro single ~396) 396
- Pattern repeat (in, 0 = random) 19
You get
- Strips needed 31
- Strips per roll 3
- Rolls 11
No published worked example is on file for this calculation. It is checked against a hand-worked derivation of its method and an independent reference test.
Details, formula, and sources
ScopeFull-height strips across the perimeter, one repeat wasted per strip to match the run, strips per roll, and rolls. A large repeat can nearly double the order for the same area. Roll size is the product's bolt size and openings are a manual credit - a material takeoff, not a hang plan.
Formula or tablestrips_needed = ceil(perimeter_in / roll_width_in); strip_len_in = height_in + repeat_in; strips_per_roll = floor(roll_len_in / strip_len_in); rolls = ceil(strips_needed / strips_per_roll).
Source and editionFirst-principles strips-and-rolls relations with wallcovering industry estimating practice (the strip method and the one-repeat-per-strip waste rule, by name); no edition cycle.
Free accessThe strip method and the one-repeat-per-strip waste rule are public wallcovering-estimating practice. The roll dimensions are the product's stated bolt size.
What governsEstimate. AHJ and licensed professional govern.
API field namesperimeter_in, height_in, roll_width_in, roll_len_in, repeat_in, strips_needed, strips_per_roll, rolls
- Strips needed strips = ceil(perimeter / roll width); full-height strips across the runwallcovering estimating practice
- Pattern repeat strip length = wall height + one pattern repeat; one repeat is wasted per strip to match the runwallcovering estimating practice
- Rolls strips per roll = floor(roll length / strip length); rolls = ceil(strips needed / strips per roll)first principles