Wallpaper Calculator
Estimate how many wallpaper rolls to buy from wall area and the coverage listed on the roll.
Wallpaper rolls
16 rolls
334 sq ft net walls before pattern waste
- Order area
- 384 sq ft
- Coverage / roll
- 25 sq ft
- Estimated cost
- $720.00
- Gross wall area
- 384 sq ft
For a single accent wall, set width near 0 and length to the wall width, or enter openings so only one wall remains.
How this calculator works
American single rolls often cover about 27–30 square feet usable, but pattern repeats reduce that. European rolls differ - always use the label coverage.
Subtract large openings, then divide by usable coverage per roll and round up.
rolls = ceiling(net wall area ÷ coverage per roll)
- Pattern repeats increase waste
- Buy all rolls from the same dye lot
- Keep one spare roll for repairs
Frequently asked questions
How many rolls of wallpaper do I need?
Calculate net wall area, divide by the usable sq ft per roll on the label, and round up. A 300 sq ft wall area with 25 sq ft usable coverage needs 12 rolls.
How much area does a roll of wallpaper cover?
It varies widely. Many US rolls advertise around 27–30 sq ft before pattern waste. Check your specific product.
Do I subtract windows and doors?
Yes for large openings. Small windows may not save a full roll after pattern matching, so many installers only subtract big doors/windows.
Related calculators
Keep planning your project with these tools, or browse the Interior Finish category.