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Wallpaper Calculator: Plan Your Rolls Before You Hit the Road

Back from a long stretch of highway and finally ready to tackle that bedroom you've been daydreaming about between mile markers? Our Wallpaper Calculator gets you out of the math weeds so you can stay focused on the fun part — picking the pattern. Whether you're freshening up the camper, redoing the spare room before the next trip, or knocking out a project during a brief stop home, you don't want to be the person making a second drive back to the hardware store because you came up two rolls short. Punch in your room dimensions, your roll size, and your repeat, and the Wallpaper Calculator hands you a clear

How to use Wallpaper Calculator: Plan Your Rolls Before You Hit the Road

  1. Measure your room. Grab a tape measure and note the height of your walls and the total length around the room (perimeter).
  2. Subtract doors and windows. Measure any large openings you won't be papering and have those numbers ready to deduct.
  3. Enter your roll dimensions. Type in the width and length of the wallpaper roll you're planning to buy — it's printed on the label.
  4. Add the pattern repeat. If your wallpaper has a repeating design, enter the repeat length so we can factor in the extra waste.
  5. Hit calculate. The tool spits out the number of rolls you need, with a small buffer baked in for trims and mistakes.
  6. Buy and roll out. Round up to the nearest roll, grab them on your next supply run, and you're set.

Frequently asked

How accurate is the Wallpaper Calculator? It's accurate as long as your measurements are. We add a small buffer for waste, but always double-check your wall dimensions before buying.
Should I round up the number of rolls? Yes — always round up. Running short mid-project is way worse than having an extra roll on the shelf for future repairs.
Does it account for pattern repeats? It does. Larger repeats waste more paper, so entering that number gives you a more realistic count.
What if my room has weird angles or slopes? For odd shapes, break the room into rectangles, calculate each section separately, then add the totals together.
Do I need to subtract doors and windows? For accuracy, yes. Small openings don't matter much, but big windows and doorways can save you a roll or two.
Can I use it for ceilings? Absolutely. Just treat the ceiling as its own surface and enter the length and width as your dimensions.
Is the tool free to use? Yep, completely free. Use it as many times as you need — handy when you're planning multiple rooms back-to-back.
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