Estimate wallpaper rolls from wall size and waste.
Quick planning, rough comparisons, and checking whether your assumptions are in the right range before you rely on final quotes or advice.
Review the assumptions below, then compare with related calculators if your decision depends on rates, eligibility, or provider-specific rules.
How this calculator works
- Wall area is increased by a waste allowance for trimming and pattern repeat.
- Total coverage is divided by roll coverage.
- The result is rounded up to full rolls.
Worked example
A 40 sq m wall area with 15% waste needs about 46 sq m of paper coverage.
Important assumptions
- Pattern repeat can increase actual waste.
- Roll sizes vary by manufacturer.
FAQ
Are these calculators free?
Yes. lankacalculator tools are free to use and designed to be quick to access without sign-up.
How accurate are the results?
The calculators use clear assumptions and formulas, but results are estimates and should be checked against official documents or provider terms.
Can I use this on mobile?
Yes. The layout is built to work cleanly on phones, tablets, and desktops.
Do you store my inputs?
No account is required for these tools, and calculator inputs are not stored as user profiles in this v1 setup.