How many rolls do I need?

How to measure a wall for wallpaper

1. Measure the wall height from finished floor to finished ceiling in two or three places. Use the tallest number.
2. Measure the full width of each wall you want to cover, at its widest point.
3. Don't subtract baseboards, crown molding, doors, or windows.
4. Round up to the next full inch (or centimeter).
5. For sloped ceilings, stairways, or soffits, measure to the tallest point. If you are not sure, send us your measurements and we will check them.

For the most accurate wallpaper estimate, always measure the actual wall rather than relying on builder plans, listing dimensions, or memory.

How to use the wallpaper roll calculator

1. Choose ft/in or cm.
2. Enter the wall height, or tap 8', 9' or 10'.
3. Enter each wall's width, or switch to Whole room and enter the room's length and width.
4. Choose your wallpaper type: Peel & Stick, Pre-pasted or Traditional.
5. Your estimate updates as you type. Open See the math to see how many strips each roll gives at your wall height.

Planning more than one room? Use Rooms this size to add identical rooms, then use Copy link to this estimate to save or share your numbers.

How we calculate your rolls

1. Strip length: your wall height plus 4" for trimming (2" at the ceiling and 2" at the floor), as in our installation guide.
2. Strips needed: your total wall width divided by the 24" roll width, rounded up.
3. Spare strips: 10% extra (at least one strip) for pattern matching and small mistakes.
4. Rolls: the strips needed divided by the number of full strips each roll gives at your height, rounded up.

We then compare single rolls, double rolls, and a mix of both, and show you the lowest-cost way to order.

Single roll vs. double roll

• Single roll: 24" wide × 13' long (156").
• Double roll: 24" wide × 27' long (324").
• At common ceiling heights of 7' to 12', a single roll gives one full-height strip. A double roll gives two or three.
• Double rolls usually cost less per strip. A single roll is a good way to add one more strip to an order.

Our rolls come in Peel & Stick, Pre-pasted, and Traditional. Not sure which one is right for your room? Compare wallpaper types.

What affects how many wallpaper rolls you need?

• Wall height decides how many full strips you can cut from each roll.
• Wider walls and larger rooms need more strips.
• Large pattern repeats can add some waste when you match strips.
• Doors and windows save less wallpaper than most people expect.
• Accent walls usually need fewer rolls, but exact coverage still depends on wall size and pattern layout.

Even if you are only wallpapering one wall, it is still important to calculate correctly. Many customers search for an accent wall wallpaper calculator, but the same measuring principles still apply.

Common wallpaper measuring mistakes

• Only measuring the center of the wall instead of the full width.
• Ignoring ceiling height changes across the room.
• Subtracting too much for windows and doors.
• Forgetting the extra length each strip needs for trimming.
• Estimating by square footage alone, which can leave you short at some wall heights.

A wallpaper square footage calculator can be useful for rough planning, but wallpaper is best estimated by strip count and how many strips each roll gives. The example below shows why.