How to measure
Measure the total wall run and maximum height. Match the roll dimensions to the package you buy, especially single versus double rolls.
How the estimate works
Round wall height plus trimming up to a pattern repeat. Divide roll length by strip length; round total strips into whole rolls.
A worked example
44 ft of wall at 8 ft high, 20.5 in wide × 33 ft rolls, no repeat and 4 in trimming needs 26 strips and 9 rolls.
Before you buy
Conservative full-height strips: openings are not subtracted. Half-drop patterns, sloped walls and complex layouts need installer verification. Default values are illustrative starting points. Check the label and adjust them to your product.