Home & DIY

Wallpaper Calculator

Estimate how many wallpaper rolls your wall needs.

Total wall width (ft)

Wall height (ft)

Coverage per roll (sq ft)

Rolls needed

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Wall area—

A standard US double roll covers about 56 sq ft. Add 10% for pattern matching.

How many rolls of wallpaper do I need?

Multiply wall width by height to get the area, then divide by the coverage per roll and round up. Subtract doors and windows for a tighter estimate.

How much does a roll of wallpaper cover?

A standard US double roll covers about 56 square feet of wall.

Should I add extra for pattern matching?

Yes — add about 10–15% for pattern repeats and waste.

Do I subtract doors and windows?

You can subtract large openings for a more accurate count, but keeping a little extra is wise.