Wallpaper Rolls Calculator
Estimate rolls needed with a roll size preset, custom sizes, and a waste factor.
Quick guide
- Start with total wall area you plan to cover (square feet or square meters).
- Subtract large openings if you want a tighter estimate, then add a waste factor.
- Use a roll size preset or enter your roll width and length to estimate coverage.
Wallpaper Rolls Calculator
Estimate rolls needed with a roll size preset, custom sizes, and a waste factor.
Units
Results
Roll count is rounded up to whole rolls.
- Net area after openings (sq ft)
- 250
- Area with waste (sq ft)
- 275
- Coverage per roll (sq ft)
- 57.8
- Rolls needed
- 5
- Total coverage (sq ft)
- 289
How to measure for wallpaper
- Measure each wall width x height and add them for total wall area.
- Optionally subtract doors and big windows (many estimates leave them in and rely on waste).
- Increase waste for patterns, lots of corners, or many small wall sections.
Assumptions to double-check
- This estimates coverage by area; real installs may need extra for pattern matching and trimming.
- Roll sizes vary by brand and region; confirm the label for exact width and length.
- Always round up to whole rolls and keep extra for repairs if you may need to match dye lots later.
Buying tips
- Buy all rolls at once when possible so the dye lot matches.
- If you’re using patterned wallpaper, plan a higher waste factor for matching.
- Check whether your product is sold as single vs double rolls and use the correct coverage.
Last updated: Dec 2025
FAQ
Should I subtract doors and windows?
For a quick estimate, many people don’t subtract openings. If you want a tighter estimate, subtract large doors and windows here.
What waste factor should I use for wallpaper?
Waste varies by pattern matching, corners, and cuts. 10% is a common starting point; increase it for complex layouts or patterned wallpaper.
Why is the roll count rounded up?
You can only buy whole rolls, and extra helps cover mistakes and future repairs.
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Browse this category →Disclaimer
Results are estimates for informational purposes only. Always verify measurements and product specifications.