墙纸计算器
计算装饰房间所需的墙纸卷数和面积。
ft
ft
sq ft
sq ft/roll
Rolls Needed
9
Net Wall Area428 sq ft
Area with 10% Waste471 sq ft
Rolls Needed vs Room Perimeter
公式
How to Calculate Wallpaper Rolls
Measure the room perimeter and wall height to get gross wall area. Subtract doors and windows. Add 10% for waste/pattern matching.
Formula
Net Area = (Perimeter x Height) - Doors/Windows
Rolls = ceil(Net Area x 1.10 / Coverage Per Roll)
计算示例
52 ft perimeter, 9 ft walls, 40 sq ft doors/windows, 56 sq ft rolls.
- 01Gross wall area = 52 x 9 = 468 sq ft
- 02Net area = 468 - 40 = 428 sq ft
- 03With 10% waste = 428 x 1.10 = 470.8 sq ft
- 04Rolls needed = ceil(470.8 / 56) = 9 rolls
常见问题
How much waste should I plan for?
Allow 10% extra for general waste. Patterned wallpaper with large repeats may need 15-20% extra for pattern matching.
How do I measure room perimeter?
Add the lengths of all four walls. For a 14 x 12 ft room: perimeter = 14 + 12 + 14 + 12 = 52 ft.
What is standard wallpaper roll coverage?
US standard single rolls cover about 36 sq ft usable, double rolls about 56-72 sq ft. Check the roll specifications before buying.
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