Wallpaper Calculator
Rolls, strips, and cut lengths for any room or accent wall — with the pattern repeat handled the way a paperhanger does it, not a rough square-foot guess.
Openings aren't deducted — see the FAQ for why.
Check the label — length varies by brand.
Printed on the label. 0 for solids, textures, and random-match papers.
You need
Enter dimensions
| Detail | Amount |
|---|---|
| Strips needed | — |
| Cut length per strip | — |
| Strips per roll | — |
Mid-range papers commonly run $40–$100 per double roll.
What Will This Wallpaper Cost?
Wallpaper pricing has a wide spread — designer paper can cost more than the labor to hang it, and stripping old paper can cost more than either. Here's the job as calculated above.
Never hang new paper over old. It bubbles, and the seams beneath telegraph through.
Estimated wallpaper cost
Enter dimensions above
| Line item | Amount |
|---|---|
| Wallpaper | — |
| Hanging labor | — |
| Stripping old paper | — |
National ranges for planning. Most professional installers carry a day-rate minimum, so a single small wall costs more per square foot than a whole room.
What wallpapering costs in 2026
| Line item | Typical cost | Notes |
|---|---|---|
| Wallpaper, budget | $25–50 per double roll | Basic paper and vinyl |
| Wallpaper, standard | $50–120 per double roll | Where most retail patterns sit |
| Wallpaper, designer | $120–350 per double roll | Hand-printed, grasscloth, murals |
| Professional hanging | $3–7 per sq ft | Or $30–50 per roll; $30–80/hour |
| Stripping old paper | $50–300 per wall | Plus skim-coating if the surface tears |
| Typical room, all in | $325–825 | National average around $600 |
The parts people don't budget for
- Prep can be 25–40% of the whole job. Stripping, skim-coating, and sizing the wall is where the hours go — and where a cheap quote quietly cuts corners.
- Small jobs carry a minimum. Many licensed installers set a day-rate floor, so a powder-room accent wall may cost several hundred dollars regardless of its size. Bundling rooms into one visit is cheaper per wall.
- Pattern repeat drives waste, and waste drives cost. A large repeat can add 20–30% more paper — on designer stock that's real money, which is exactly what the calculator above accounts for.
- Buy every roll from one batch. Dye lots differ visibly between batches, and a mid-wall color shift means re-hanging the wall.
- Peel-and-stick is the DIY answer — more expensive per roll than basic paper, but forgiving to hang and removable later without steam and scrapers.
How to Calculate Wallpaper
Wallpaper math is strip counting, not square footage — because every strip must be a full-height cut that lines up with its neighbor:
- Cut length: wall height plus 4″ trim allowance. With a pattern repeat, round that up to a whole number of repeats.
- Strips needed: wall (or perimeter) width ÷ roll width, rounded up.
- Strips per roll: roll length ÷ cut length, rounded down.
- Rolls: strips needed ÷ strips per roll, rounded up — plus one spare from the same batch.
Wallpaper formulas
Cut length = ceil((height + 4″) ÷ repeat) × repeat
Rolls = ceil( ceil(width ÷ roll width) ÷ floor(roll length ÷ cut length) )
Worked example — 12 × 12 room, 8 ft walls, 20.5″ × 33 ft rolls, no repeat: perimeter 576″ ÷ 20.5″ = 29 strips; cut length 100″ → 3 strips per roll → 10 double rolls.
Why the Pattern Repeat Changes Everything
Same 12 × 12 room, same rolls — watch the roll count climb with the repeat:
| Pattern repeat | Cut length | Strips per roll | Double rolls |
|---|---|---|---|
| None (0″) | 100″ | 3 | 10 |
| 12″ | 108″ | 3 | 10 |
| 18″ | 108″ | 3 | 10 |
| 25″ | 100″ | 3 | 10 |
| 36″ | 108″ | 3 | 10 |
On 8 ft walls a 33 ft roll absorbs most repeats. The trap is 9–10 ft ceilings: cut lengths past 132″ drop you to 2 strips per roll, and the roll count jumps 50%.
Tips Before You Order
- Same batch number on every roll. Dye lots shift between print runs; mismatched rolls show as a color seam.
- Buy one spare roll. Future repairs need paper from your run — it won't exist later.
- Check single vs. double roll pricing. US papers are priced per single but sold per double — a "$30" paper is a $60 bolt.
- Drop-match patterns waste more. If the label says half-drop, treat the effective repeat as 1.5× the stated figure for estimating.
- Prime the wall. Wallpaper primer (sizing) makes hanging easier and future removal possible.
Frequently Asked Questions
How many rolls for a 12×12 room?
10 standard double rolls at 8 ft ceilings with no repeat; large repeats or taller walls push it to 12+.
What is a pattern repeat?
The vertical distance before the design repeats. Strips are cut in whole repeats so they align — the offcut is unavoidable waste you must buy.
Single roll vs. double roll?
Priced per single, sold per double. A metric double roll is 20.5″ × 33 ft ≈ 56 sq ft gross.
Do I subtract doors and windows?
Traditionally no — you still need full-height strips around openings, and pattern-matched offcuts rarely reuse. Only deduct very large openings.
How many strips per double roll?
3 on standard 8 ft walls; 2 once the cut length passes ~11 ft (tall ceilings or big repeats).
Should I buy extra?
One spare roll, same batch. Unopened rolls usually return; a missing repair roll never does.
References
- Wallcoverings Association — installation and estimating resources: wallcoverings.org
- York Wallcoverings — roll dimensions and hanging guides: yorkwallcoverings.com
- Graham & Brown — pattern match types explained: grahambrown.com
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