A 10 ft × 8 ft wall covered in standard 20.5-inch peel-and-stick rolls needs about 4 rolls: six strips across the wall, and two 8 ft drops out of each 18 ft roll once you allow for trimming. Removable wallpaper is forgiving, so a 10% cushion is usually plenty.

Peel-and-stick hangs in vertical strips like traditional paper. Give the wall width and height.
Want to see how this number is worked out? Every formula, buffer and product dimension we use is published at how we calculate.
Peel-and-stick sticks to smooth, clean, painted walls and lifts off without damage, which makes it the go-to for rentals and quick refreshes. It grips best on satin or semi-gloss paint that has fully cured — give fresh paint a few weeks first.
Wipe the wall down, let it dry, and start from a plumb line rather than the corner (corners are rarely straight). Overlap seams by a hair and smooth from the centre out to chase bubbles to the edge.
Divide your wall width by the roll width for the number of strips, then divide the roll length by the wall height plus a trimming allowance for strips per roll. Rolls = strips ÷ strips-per-roll, rounded up, plus ~10%. The calculator above does it for you.
On smooth, fully cured painted walls it usually removes cleanly. On fresh paint, textured walls, or unpainted drywall it can lift the surface — test a small area first.
Yes in low-splash areas, but steam and direct water weaken the adhesive over time. Keep it away from shower surrounds and behind sinks.
About 10% covers trimming and the occasional misalignment. Add more for busy patterns that need matching between strips.