Shopping for wallpaper comes down to one number: how many rolls you actually need. Get the measurement right, order it all in one transaction, and the rest is straightforward. Here's how.
How to Measure a Wall for Wallpaper
Measure the longest or tallest dimension of each wall individually, and ignore every door and window in that wall.
This feels wrong. It is not wrong. Pattern has to run continuously up and over openings for the repeat to match, so the paper gets cut as if the door or window isn't there. Measuring around openings under-orders every time.
Do this wall by wall, not room by room. A room with four different wall heights needs four separate measurements.
Use a Wallpaper Calculator, Not a Guess
Enter your wall dimensions into a wallpaper calculator built for the specific pattern you're ordering. It should autopopulate the repeat type and dimensions for that design and calculate the number of rolls you need.
A good calculator adds 2 in (5 cm) to the top of every drop automatically, the same margin called for in professional hanging instructions. That covers trimming and alignment, not sloppy measuring.
For extra room to work with, look for an option to include extra drops. Each one adds a full drop on top of the estimate, so a measuring slip or a cutting mistake doesn't turn into a second order and a second wait.
Use our wallpaper calculator here.
What Is a Drop?
A drop is one full cut length of wallpaper, from top to bottom of a strip, ready to be hung on the wall. A single roll is cut into multiple drops depending on wall height and pattern repeat.
Single Roll vs. Double Roll vs. Four-Roll Set
Single roll and double roll. A standard AWB roll is 24.2 in wide and 33 ft long. If a project calls for what's traditionally referred to as a double roll, order two. If it calls for a single roll, order one.
Four-roll set. Some designs are meant to be read across a wider span than a single or double roll can cover, so they're sold as one matched unit of four rather than four separate purchases. The rolls print together to hold the pattern's continuity across the full width. Two-roll half sets are also available, so a project isn't forced into buying more rolls than it needs.
A calculator handles this math automatically: it totals the number of rolls your walls require, then breaks that number down into however many four-roll sets you need, plus a two-roll set for any partial remainder.
Order Every Roll in One Transaction
Wallpaper is typically printed to order rather than pulled from batch stock, which means dye lots can shift between print runs. A reorder placed later may not match your original order exactly.
Order every roll a project needs in a single transaction. If you're caught between two quantities, order the extra roll. Different patterns require different amounts depending on match type and repeat size, so when the math is close, round up rather than risk a mismatched second order.
When to Ask Before You Order
Unusual spaces, awkward angles, and numbers that don't add up are common with older homes and irregular rooms. If a measurement doesn't seem to make sense, ask before you order rather than after.
Contact us here for additional information
FAQ: Shopping for Wallpaper
How many rolls of wallpaper do I need? Use a wallpaper calculator for your specific pattern. Measure the longest or tallest dimension of each wall, ignore doors and windows in that wall, and enter those measurements. The calculator accounts for the pattern repeat and match type automatically.
Do I need to measure around doors and windows? No. Measure the wall as if the opening weren't there. Pattern has to run continuously for the repeat to match, so paper is cut for the full wall height regardless of what's mounted on it. Measuring around openings will under-order every time.
What's the difference between a single roll and a double roll? A double roll is simply two single rolls. If a project specification calls for a double roll, order two standard rolls.
What is a four-roll set? A design sold as one matched unit of four rolls, printed together to hold the pattern's continuity across a wider span than a single roll can cover. Two-roll half sets are also available for smaller projects.
Will my second order match my first if I need more later? Not guaranteed. Wallpaper is often printed to order, so a reorder can land in a different print run with a slight color shift. Order every roll a project needs in one transaction, and round up if you're between quantities.
What if I measure wrong or need extra paper? Look for a calculator option to include extra drops. Each one adds a full drop on top of the base estimate, giving you a buffer against a measuring slip or cutting mistake without triggering a second order.