Peel & Stick Coverage Calculator
Enter your wall measurements and get the exact number of rolls, boxes, or sheets to buy — with doors, windows, and a waste allowance included. Works for peel-and-stick wallpaper, tile, window film, and contact paper.
Tip: use the coverage printed on your product’s packaging. The defaults above are typical values you can edit.
- Wall area0
- Minus doors & windows0
- Net area0
- +10% waste0
- Total coverage needed0
Recommended tools are shown here as placeholders. Affiliate products will be added only after we vet the program and its terms — see our affiliate disclosure.
Recommended tools & materials
- ✓ Peel & stick wallpaper / tile product TBD
- ✓ Tape measure & level product TBD
- ✓ Smoothing tool / squeegee product TBD
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How we calculate this
The math is transparent — here’s exactly what the calculator does:
- Wall area =
width × heightfor each wall, added together. - Openings =
width × height × countfor each door or window, subtracted from the wall area. - Net area = wall area − openings.
- With waste =
net area × (1 + waste %). Waste covers pattern matching, trimming, and mistakes. - Quantity =
total ÷ coverage per unit, always rounded up to the next whole roll or box.
Worked example: a 22 ft × 13 ft room’s walls total 286 sq ft. Add 10% waste (28.6 sq ft) = 314.6 sq ft. At 30 sq ft per roll, that’s 314.6 ÷ 30 = 10.5 → 11 rolls.
All measurements are converted internally to a single unit before calculating, so mixing feet/inches or cm/m is handled automatically. Results are estimates — always confirm your product’s stated coverage before buying.
How to measure your walls
Measure the width of each wall and its height from baseboard to ceiling. For an accent wall, measure just that wall. For a full room, add each wall separately using “Add another wall.” If you’re tiling a backsplash, measure the width of the run and the height from countertop to the underside of the cabinets.
Frequently asked questions
How much extra should I buy for waste?
For plain, non-repeating designs, 10% is a safe default. For patterned wallpaper that needs matching, or lots of cuts around outlets and corners, choose 15%. Simple, small areas can use 5%.
Should I subtract windows and doors?
For large openings (a door or a picture window) yes — it can save you a roll. For small windows it’s optional, and leaving them in simply adds a little buffer.
Why does it round up to a whole roll?
You can’t buy half a roll, and coming up short mid-project often means a second order with a different dye lot. Rounding up protects your finish.
Does this work for tile and window film too?
Yes. Pick the product at the top and set the coverage per box or roll from its packaging — the area math is the same.