Wallpaper Calculator
Estimate wallpaper rolls, strips needed, pattern-repeat waste, and rough material cost from room perimeter, wall height, openings, and roll size.
Last updated: 2026-03-25
Wallpaper calculator
Enter your values
Turn room perimeter, wall height, and pattern repeat into a more realistic wallpaper order.
Recommended Rolls
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Enter the room and roll dimensions to estimate wallpaper rolls and rough material cost.
Calculation History(0)
Example calculations
Tap an example to prefill the calculator with sample values.
Bedroom accent room
44 ft perimeter with standard 27 in rolls
A typical bedroom where door and window deductions help, but repeat-driven strip loss still matters.
Result: Pattern repeat often adds one or more rolls beyond a simple square-foot estimate
Wide-roll dining room
54 in roll width with no repeat
Wide rolls can reduce strip count materially even in larger rooms.
Result: Wider wallpaper can cut the order size even when the room itself is larger
How the wallpaper estimate works
The calculator converts room perimeter into strip count using the roll width, then calculates how many usable strips fit in each roll based on wall height and pattern repeat.
That means the recommended roll count reflects the strip-driven installation reality rather than relying only on wall area, which often understates repeat-heavy patterns.
Wallpaper calculator FAQs
How strips, pattern repeat, and installer buffer change the final order.
Why can wallpaper require more rolls than square footage suggests?
Because wallpaper is installed in strips, not as one continuous sheet. Pattern repeat and wall height determine how many full drops fit in a roll, which often matters more than simple wall area.
Should I subtract doors and windows?
Yes for planning, but keep some caution. Pattern matching, cut sequencing, and future repairs can still require more paper than the net wall area alone implies.
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