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Wallpaper Roll Calculator with Pattern Repeat
Patterned wallpaper must be cut in full repeat increments, so strip length is often longer than wall height. Round each strip up to the next pattern repeat, add trimming allowance, then divide the roll length by that cut length. Roll labels may quote total area even when pattern matching reduces usable coverage.
Planning estimate only. Check measurements and real-world constraints before buying materials or making a commitment.
Calculate your scenario
Change any input. Results update immediately.
Your results
Cut length per strip
105.0 in
Includes a 4-inch trimming allowance and pattern rounding.
Strips needed
24
Based on wall perimeter and roll width.
Minimum rolls
8
3 full strips per roll.
How the calculation works
The calculator applies this relationship to the inputs above. Keep every measurement in the unit shown.
Worked example
Use this example to check the calculator by hand before relying on a result.
Assumptions behind the result
- • Pattern repeat is vertical.
- • A 4-inch trimming allowance is used.
- • Rolls come from the same dye lot.
- • Walls are reasonably plumb.
- • Complex half-drop matches need extra material.
Mistakes that change the answer
- • Using label area without checking pattern repeat.
- • Mixing feet and inches.
- • Assuming leftover partial strips fit full-height areas.