Rolls Needed
8
Min Rolls
7
Strips
26
Net Area
301 sq ft
You Need: 8 rolls
7 minimum + 1 extra for safety
8
incl. extra
26
4/roll
Dye Lot Tip
Order all rolls from the same batch/dye lot to ensure color consistency. Check pattern direction before cutting.
Inputs
Result
Perimeter = 2 × (12 + 10) = 44 ft. Strips = 44 ft / (20.5"/12) = 25.8, rounded up to 26. Each roll yields floor(33/8) = 4 strips. Rolls = ceil(26/4) = 7. With 1 extra = 8 rolls.
Inputs
Result
Perimeter = 2 × (16 + 14) = 60 ft. Strips = 60 / (20.5"/12) = 35.1, rounded up to 36. With 21" pattern repeat, effective height per strip = 9 + 1.75 = 10.75 ft. Strips per roll = floor(33/10.75) = 3. Rolls = ceil(36/3) = 12, with 1 extra = 13 rolls.
Inputs
Result
Perimeter = 2 × (10 + 10) = 40 ft. Strips = 40 / (20.5"/12) = 23.4, rounded up to 24. With 12" pattern repeat, effective height = 8 + 1 = 9 ft. Strips per roll = floor(33/9) = 3. Rolls = ceil(24/3) = 8, with 1 extra = 9 rolls.
Measure wall perimeter × wall height = total sq ft. Standard roll covers ~30 sq ft usable (after waste). Divide total by 30 and round up. Example: 50 linear feet × 8 ft = 400 sq ft ÷ 30 = 14 rolls.
| Room Size | Wall Area (8' ceiling) | Rolls Needed* | With Pattern (+15%) |
|---|---|---|---|
| 10×10 (40 LF) | 320 sq ft | 11 rolls | 13 rolls |
| 12×12 (48 LF) | 384 sq ft | 13 rolls | 15 rolls |
| 12×16 (56 LF) | 448 sq ft | 15 rolls | 17 rolls |
| 14×18 (64 LF) | 512 sq ft | 17 rolls | 20 rolls |
Pattern repeat is the distance before the design repeats vertically. Larger repeats = more waste when matching. No repeat: No extra needed. 12" repeat: Add 10%. 24"+ repeat: Add 15-20%. Match type affects cutting.
| Repeat Size | Extra Needed | Matching Type | Difficulty |
|---|---|---|---|
| No repeat | 0% | Random | Easy |
| 0-6" repeat | 5-10% | Straight match | Easy |
| 7-12" repeat | 10-15% | Straight match | Medium |
| 13-24" repeat | 15-20% | Drop match | Medium |
| 24"+ repeat | 20-25% | Half-drop | Difficult |
Only subtract large openings (doors, windows over 3 ft wide). Small windows and the 10-15% waste allowance typically covers them. It's better to have a roll extra than run short mid-project.
US single roll: 27" wide × 27 ft long (~56 sq ft). US double roll: 27" × 54 ft (~108 sq ft). Euro roll: 21" × 33 ft (~58 sq ft). Usable coverage is 15-30% less due to trimming and pattern matching.
| Roll Type | Width | Length | Total Sq Ft | Usable Sq Ft |
|---|---|---|---|---|
| US Single | 27" | 27 ft | 56 sq ft | ~28-30 sq ft |
| US Double | 27" | 54 ft | 108 sq ft | ~56-60 sq ft |
| Euro | 21" | 33 ft | 58 sq ft | ~30-35 sq ft |
| Commercial | 54" | 30 yds | ~135 sq ft | Varies |
Measure accent wall width × height = sq ft. Standard 27" wide strips: Divide wall width by 27" for number of strips. Round up. Multiply strips by wall height + waste for total length needed.
| Accent Wall Width | Strips (27" wide) | Rolls (8' height) | With Pattern |
|---|---|---|---|
| 8 ft | 4 strips | 1 roll | 2 rolls |
| 10 ft | 5 strips | 1 roll | 2 rolls |
| 12 ft | 6 strips | 2 rolls | 2 rolls |
| 15 ft | 7 strips | 2 rolls | 3 rolls |
Colors can vary slightly between production batches (dye lots). Ordering all wallpaper at once from same lot ensures consistent color. Check lot numbers on rolls. If running short, better to return unopened rolls than reorder different lot.
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Last Updated: Mar 9, 2026
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