Wallpaper Calculator

How many rolls of wallpaper do I need?
To find how many rolls of wallpaper you need, calculate the total wall area (wall width x height, added up), subtract doors and windows, then divide by the usable coverage per roll after accounting for pattern repeat and trim waste. A standard American roll covers about 35 square feet but usable coverage is often closer to 25 to 27 square feet. Always round up and buy an extra roll. Our Wallpaper Calculator factors in pattern repeat and openings automatically.

How does pattern repeat affect how much wallpaper I need? 
Pattern repeat is the vertical distance before a design repeats, and a larger repeat means more waste because you trim each strip to align the pattern with the previous one. A small or random-match pattern wastes little, while a large repeat (say 18 to 24 inches) can waste a foot or more per strip. Add the repeat length to each strip’s height when calculating. Drop-match patterns waste more than straight-match. Always check the repeat on the roll label before estimating.

What’s the difference between single and double rolls? 
Wallpaper is often priced as a ‘single roll’ but sold and packaged as ‘double rolls’ (two singles joined), because a double roll’s longer length lets you get more full-height strips with less waste. Coverage figures usually refer to single rolls, so read carefully: a double roll covers about twice the single-roll area. When calculating, work in the same unit the store sells in. Buying double rolls from the same batch ensures consistent color and pattern.

What’s the difference between peel-and-stick and traditional wallpaper? 
Peel-and-stick wallpaper has a self-adhesive backing—you peel and apply it directly, with no paste or water needed, and it removes cleanly, which makes it ideal for renters, accent walls, and beginners. Traditional wallpaper is either paste-the-wall or paste-the-paper, generally more durable and available in more patterns and textures, but it requires adhesive, more skill to hang, and more effort to remove. Peel-and-stick is forgiving and repositionable; traditional gives a higher-end, longer-lasting result for permanent installs.

What tools do I need to hang wallpaper? 
Hanging wallpaper calls for a smoothing tool (plastic squeegee or brush) to press out bubbles, a sharp utility knife with extra blades for trimming, a straightedge or wide putty knife as a cutting guide, a level or plumb line to keep strips straight, and a seam roller. For traditional paper you’ll also need a paste brush or tray and a water tray for pre-pasted types, plus a sponge and bucket for cleanup. A measuring tape, pencil, and step stool round out the basics.