Wallpaper Yardage Calculator
Please Note: This calculator is a guide only. We highly recommend using a professional wallcovering installer to measure and advise on how much wallpaper you need prior to ordering.
Cape Lily can not responsible for incorrect quantities ordered based on the calculator.
10% extra wallpaper should be added when using our yardage calculator. The yardage calculator should not be used for mural /panel designs.
Wallpaper Measurement FAQs
We recommend always consulting a professional wallpaper installer to confirm your measurements. Providing the wrong measurements can lead to wasted materials, increased costs, and installation delays.​​​​​​​​​​​​​​​​
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Wallpaper Measuring Frequently Asked Questions
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How do I calculate the amount of wallpaper needed for a room?​
Measure the width of each wall at its widest point and the height from the lowest floor point to the highest ceiling point, then combine the measurements of each wall to determine the total coverage needed.
This approach ensures enough material while accounting for pattern repeats and potential installation challenges. ​
Divide the total square footage by wallpaper width to determine the number of rolls/yards needed. Always add 10% extra to account for potential mistakes. Use our wallpaper calculator to help!​
Different wallpaper designs will require different yardage depending on the size of the pattern repeat and the match type.
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What tools are required for accurate measurements?
A metal tape measure provides the most reliable measurements for wallpaper projects rather than a soft cloth tape measure.
Take measurements twice to confirm accuracy. Record each dimension in inches and round up by 3-4 inches for accuracy.
The tape measure must lay flat against the wall surface. Pull it taut to avoid sagging, which can lead to inaccurate measurements.
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What room features should I consider when measuring a room for wallpaper?
When measuring for wallpaper do not deduct for doors and windows. Be sure to include measurements for inside corners, around doorways, above windows or other features that won't need covering as these will still require material to account for pattern-matching. Note that light switches, outlets, air vents or radiators require careful cutting during installation but don't affect the quantity calculation.
If in doubt always include the area in your measurements or consult a professional.
If there is a baseboard, chair rail or wainscoting you will measure from the lowest point to the ceiling. Similarly if there is any ceiling molding you will measure to where you want the wallpaper to meet the ceiling molding.​​​
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Sloped or slanted walls need special consideration. Measure both the shortest and tallest points, then use the longer measurement to ensure full coverage. For example, when measuring a sloping staircase you will still need to measure to the highest point of the ceiling.
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Curved walls demand additional material. Measure the actual curved surface distance rather than the straight-line distance between endpoints.​
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Measure each wall section separately for accuracy.​