Wallpaper Calculator
Estimate wallpaper rolls, full-height drops, pattern-repeat adjustment, wall area and material cost after door and window deductions.
Default project preview
10 rolls
Net wall area
381 ft²
Drops needed
29
Drops per roll
3
Adjusted drop
8.75 ft
Calculator
Build the material order
Your order will appear here
Enter the project details and calculate a rounded material estimate.
Methodology
Transparent calculation
BuildMeter converts every input to a consistent internal unit, applies the selected allowance, and rounds products up to whole purchasable units.
Net wall area = perimeter × height − openings. Pattern-adjusted drop = height rounded up to the next repeat. Rolls = round up (required drops ÷ drops per roll).
BuildMeter Guides
Understand the measurements and assumptions
Use these visible reference guides before changing project inputs or planning allowances.
FAQ
Wallpaper Calculator questions
Why does pattern repeat increase roll quantity?+
Each strip may need extra length so the pattern aligns with the previous strip.
Should all openings be deducted?+
Large openings can be deducted, but small areas above doors and around windows still require cut pieces.
What is a double roll?+
Wallpaper packaging terminology differs by market. Always enter the actual width and total roll length printed on the product.