Wallpaper roll calculator

Estimate strips and rolls while accounting for wall height and pattern repeat. Your inputs stay on this device.

Currency

Metric / US customary

Room perimeterftWall heightftRoll widthinRoll lengthftPattern repeatinTrim allowanceinPrice per roll¤

Plan to buy

10rolls of wallpaper

30 strips at 104 in each; 3 full strip(s) per roll. Estimated cost: $480.00.

Formulacut length = wall height + trim, rounded to repeatrolls = strips needed ÷ full strips per roll

This conservative method does not subtract openings. Buy the same dye lot and check match instructions.

Measurement guide · not to scale

ARoom perimeter
BWall height

Project estimate →

How to use it

Measure once. Check the label. Round up.

Enter the finished dimensions of the area.
Copy coverage, package size and price from the product you will actually buy.
Use the result as a planning estimate, then confirm field conditions and supplier guidance.

Source & limits

Transparent by default

The editable defaults are starting points, not hidden guarantees. Product yield, pattern, breakage and site conditions can change the purchase quantity.

Wallcoverings Association estimating guidance →Read our calculation standard →

Calculation checks: worked examples, unit conversions and package rounding · 27 September 2026. Planning estimates; confirm product-specific data.

Keep planning

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Practical project math. Free, private and clear.

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