How many rolls of wallpaper do I need for a 12x14 room?

For a 12×14 room with 9 ft ceilings, perimeter = 52 ft. Using a 27" wide × 33 ft euro roll with no pattern repeat, approximately 8 strips are needed with 3 strips per roll = about 3 rolls. Add 1 extra for safety.

How does pattern repeat affect wallpaper quantity?

Pattern repeat forces each strip to start at the same point in the pattern. A 12-inch repeat on 9 ft ceiling walls means ≈10 ft of wallpaper is consumed per strip instead of 9 ft, increasing the number of rolls needed by 10–20% depending on the repeat size.

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Wallpaper Roll Estimator

Estimate how many rolls of wallpaper needed for a room based on dimensions, roll size, and pattern repeat.

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Room Length (ft)

Room Width (ft)

Ceiling Height (ft)

Pattern Repeat (inches)

Enter 0 for no repeat / plain wallpaper

Roll Width (inches)

Roll Length (feet)

Wallpaper Rolls: Calculation & Pattern Repeat

Wallpaper is sold in single or double rolls. A standard US single roll covers about 35 sq ft of wall surface; a euro roll is typically 27" × ~33 ft. The critical variable is the pattern repeat — the vertical distance before the design repeats. Each strip cut must start at the same point in the pattern, wasting material equal to the repeat length.

Strips Per Roll Formula

Usable Strip Height = Ceiling Height + Pattern Repeat

Strips Per Roll = ⌊Roll Length ÷ Usable Strip Height⌋

Total Strips = Perimeter ÷ Roll Width

Rolls = ⌈Total Strips ÷ Strips Per Roll⌉

Wallpaper Roll Estimator

Rolls Required

Wallpaper Rolls: Calculation & Pattern Repeat

Strips Per Roll Formula