all toolsyour wallpaper plan
check the method
pattern matched · rolls counted
how many rolls of wallpaper do you need?
Enter the surface measurements and copy the size, repeat and match from the roll label. We’ll show the full drops, cut length and same-batch rolls to buy.
Planning estimate only. Check the current label, batch and retailer return policy before ordering.your project
measure the surface, then copy the label
The roll details are essential for a buying estimate, so this calculator never fills in a pretend pattern for you. Doors and windows are not deducted by default.
how this was worked out
see a hand-calculated half-drop example
one 10 ft wide × 9 ft high wall
Assume a 20.5 in × 32.8 ft roll, 5 in total trimming allowance, a 24 in repeat, half-drop match and no spare roll.
- Strips: 120 in ÷ 20.5 in = 5.85, rounded up to 6 full drops.
- Cut length: 108 in + 5 in = 113 in, rounded to the next 24 in repeat = 120 in per drop.
- Split the wall into 3 odd and 3 even drops.
- One 32.8 ft roll is 393.6 in. Three 120 in odd drops use 360 in; three even drops plus one 12 in phase offset use 372 in.
- Under the stated common starting-phase assumption, the estimate is 2 same-batch rolls.
Assumption: real cutting can use more paper when the roll start, damage or pattern placement prevents that shared phase. Confirm the label and return policy before ordering.
Method references · reviewed July 2026: ROMAN repeat guidance and Graham & Brown offset-match guidance.