How many rolls of wallpaper for a 12x12 room?

A 12×12 ft room with 8 ft ceilings has about 384 sq ft of wall area. Subtracting a typical 60 sq ft for doors and windows leaves roughly 324 sq ft to cover. A standard US single roll covers approximately 29 sq ft of usable area after trimming. Dividing 324 ÷ 29 ≈ 11.2 rolls. Adding 10% waste gives about 12–13 rolls. If using European double rolls (roughly 57 sq ft usable), you would need about 6–7 double rolls.

How much wallpaper do I need for one wall?

Measure the wall width and ceiling height, then multiply to get square footage. For example, a 12 ft wide × 8 ft tall wall = 96 sq ft. Divide by the usable coverage per roll (about 29 sq ft for a US single roll) to get approximately 3.3 rolls — round up to 4 and add 10% waste. For a patterned wallpaper with a large repeat, add an extra 15–20% to account for pattern matching.

What is the difference between a single and double roll of wallpaper?

In the US, a single roll of wallpaper is the standard pricing unit (roughly 29–36 sq ft of printed area) but wallpaper is almost always sold and shipped as double rolls (58–72 sq ft). European single rolls typically measure about 5.4 sq m (58 sq ft) and are sold individually. Always count in double rolls when purchasing American wallpaper to avoid pattern-matching issues between dye lots.

Wallpaper Coverage Guide: How Many Rolls Do You Need?

How to Calculate Wallpaper Rolls

Follow this four-step method for any room:

Measure the perimeter of all walls to be papered (in feet).
Multiply perimeter by ceiling height to get total wall area in sq ft.
Subtract roughly 15 sq ft per standard door and 12 sq ft per window.
Divide remaining area by usable sq ft per roll, then add 10–15% for waste (15–20% for large pattern repeats).

Formula: Rolls needed = (Wall area in sq ft ÷ Usable sq ft per roll) × 1.10 to 1.15

Roll Coverage by Width

Usable coverage per roll depends on roll width and length. Standard US single rolls contain about 36 sq ft printed, but trimming losses leave roughly 29–30 sq ft of usable coverage. European single rolls are sold as a set length (typically 10 m / 33 ft) at varying widths.

Roll Width	Roll Length (typical)	Total Area (sq ft)	Total Area (sq m)	Usable After Trimming (sq ft)
18 in (46 cm) — US standard	27 ft (8.2 m)	40.5	3.76	~29
20.5 in (52 cm) — US common	27 ft (8.2 m)	46.1	4.28	~33
27 in (69 cm) — US wide	27 ft (8.2 m)	60.8	5.65	~43
53 cm (21 in) — European single	33 ft (10 m)	58.4	5.30	~48

Rolls Needed by Room Size

Room Size (ft)	8 ft Ceiling — US Single Rolls	9 ft Ceiling — US Single Rolls	8 ft Ceiling — EU Double Rolls
10 × 10	9 – 10	10 – 11	5 – 6
12 × 12	12 – 13	13 – 14	6 – 7
14 × 14	14 – 15	16 – 17	7 – 8
15 × 20	17 – 19	19 – 21	9 – 10

Figures include a 10% waste allowance and assume one door and two windows per room. Add an extra roll or two for large pattern repeats (12 in repeat or larger).

Use our area converter to switch between sq ft and sq m when working with European wallpaper specifications.