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This free wallpaper calculator estimates the number of wallpaper rolls you need for your walls. If you plan to install new wallpaper, this guide will help you determine the correct quantity and avoid waste.
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Accurate wall measurements are essential when decorating with wallpaper. Our free wallpaper estimator quickly calculates the requirements, helping you purchase the right amount.
Calculate total wall area by measuring the length and height of each wall and multiplying them:
Sq ft = Width × Height
For irregular-shaped rooms, divide the wall into smaller rectangles, calculate each area, and sum them.
You can also use a square footage calculator for faster results.
Different wallpaper patterns affect coverage. Use the table below as a guide for standard U.S. roll coverage:
| Drop Pattern | Wallpaper Coverage |
|---|---|
| No drop pattern | 29–36 sq ft |
| 0′–6′ drop pattern | 25 sq ft |
| 7′–12′ drop pattern | 22 sq ft |
| 13′–18′ drop pattern | 20 sq ft |
| 19′–23′ drop pattern | 15 sq ft |
After calculating your wall area, determine the number of rolls needed:
Rolls = Wall sq. ft. ÷ Usable sq. ft. per roll
Wallpaper is usually sold per roll; some packs include twin rolls. A standard roll is ~5 yards long, ~27 inches wide, and covers roughly 27 sq ft usable area. Always check roll numbers to ensure consistent color and pattern.
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It provides precise estimates, but we recommend 5–10% extra wallpaper to avoid shortages. Complex rooms may need professional consultation.
Typically 35 sq ft, with ~27 sq ft usable after trimming.
For an 81″ tall wall, a standard 27″ roll provides ~3 strips.
Wallpaper usually costs more than paint. Paint is easier to apply, while wallpaper requires precise measurements. The calculator ensures you buy the right quantity for a professional finish.
Standard double roll: 20″ wide × 33″ long, also called a “bolt.”
Yes, wallpaper can increase room warmth by up to 65%.
Poor-quality adhesives may leave residue or peel. Moisture and adhesive buildup can damage walls over time.
Avoid damp areas like kitchens and bathrooms; best for dry rooms.
Typically ~15 years, depending on quality and maintenance.
Whole-home wallpapering may reduce buyer appeal and resale value.
Wallpapers are durable, cover imperfections, and can outlast paint. Using this calculator ensures accurate measurement, helping you purchase the right amount for a professional finish.
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