Wallpaper Area Formula:
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Wallpaper square footage calculation determines the total area of wall space that needs to be covered, accounting for openings like windows and doors. This helps in purchasing the correct amount of wallpaper while minimizing waste.
The calculator uses the wallpaper area formula:
Where:
Explanation: This formula calculates the gross wall area and subtracts areas that won't be covered with wallpaper.
Details: Accurate measurements prevent purchasing too much or too little wallpaper, saving money and ensuring pattern matching works correctly across all walls.
Tips: Measure the perimeter of the room by adding all wall lengths. Measure wall height at multiple points and use the maximum. Calculate opening areas (width × height) for all windows and doors.
Q1: How much extra wallpaper should I purchase?
A: Typically add 10-15% extra for pattern matching, trimming, and mistakes, especially with complex patterns.
Q2: Should I include all openings in the calculation?
A: Yes, include all windows, doors, and other permanent openings that won't be wallpapered.
Q3: How do I measure irregularly shaped rooms?
A: Break the room into rectangular sections, calculate each separately, then sum the totals.
Q4: What if my walls have different heights?
A: Measure each wall section separately and calculate areas individually before summing.
Q5: How do I account for pattern repeats?
A: Pattern repeats require additional wallpaper. Check the roll information for pattern repeat waste percentage.