Peel-and-Stick Wallpaper Calculator
Find out how many rolls of peel-and-stick wallpaper (or packs of stick-on tile) your wall needs. Add your wall, subtract doors and windows, and get a roll count with 10% extra already built in.
How to measure your wall
- Width: measure along the baseboard, corner to corner. Round up to the next inch.
- Height: measure from the top of the baseboard to the ceiling in two or three spots. Older apartments are rarely square — use the tallest number.
- Doors and windows: measure the outside of the trim. Small outlets and switches don’t count.
- Roll size: copy the width and length from the product page. Peel-and-stick rolls are often 20.5 in × 16.5 ft, but brands vary.
Why we count strips, not square feet
Wallpaper goes up in vertical strips, and every strip has to run the full height of the wall. A 16.5-ft roll gives you only one full strip on a 9-ft ceiling — the leftover (about 7 ft) is too short for another.
That’s why a square-foot calculator can leave you nearly half the rolls short. This tool counts strips, adds the trim allowance and pattern repeat, then packs the strips into rolls.
Renter tip: before you commit, stick a small test piece somewhere hidden (inside a closet works) for a week, then peel it. If it pulls paint, your wall needs a different product.