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🖼️ 墙纸用量计算器Wallpaper Calculator
按房间周长、墙高、墙纸卷的宽度和长度以及花纹回位（对花）计算需要几卷墙纸：先算每卷能裁几幅，再算整个房间需要几幅，扣除门窗宽度，比单纯按面积估算更准确。Work out how many rolls of wallpaper a room needs from the wall widths, height, roll width and length and pattern repeat. It counts how many drops each roll gives and how many drops the room needs, less doors and windows — more accurate than dividing areas.
使用说明与常见问题How-to & FAQ
「墙纸用量计算器」是什么？What is the Wallpaper Calculator tool?
按房间周长、墙高、墙纸卷的宽度和长度以及花纹回位（对花）计算需要几卷墙纸：先算每卷能裁几幅，再算整个房间需要几幅，扣除门窗宽度，比单纯按面积估算更准确。Work out how many rolls of wallpaper a room needs from the wall widths, height, roll width and length and pattern repeat. It counts how many drops each roll gives and how many drops the room needs, less doors and windows — more accurate than dividing areas.
如何使用「墙纸用量计算器」？How do I use the Wallpaper Calculator tool?
在「墙纸用量计算器」中，填写「单位制」、「墙面总宽度（周长）（英尺/米）」、「墙高（英尺/米）」、「卷宽（英寸/厘米）」、「卷长（英尺/米）」等参数，结果会随输入实时计算并显示在下方。In the Wallpaper Calculator: Fill in "Units", "Total wall width (perimeter) (ft / m)", "Wall height (ft / m)", "Roll width (in / cm)", "Roll length (ft / m)"; results are recalculated instantly as you type.
为什么按“幅”计算？Why count drops instead of area?
墙纸只能整幅竖着贴，每卷裁完整幅后剩下的短料通常用不上。所以先算每卷能裁几幅（卷长 ÷ 每幅长度），再算房间需要几幅（墙宽 ÷ 卷宽），比面积相除更接近实际。Wallpaper goes up in full-height drops, and the short leftover at the end of a roll is usually wasted. So the tool counts drops per roll (roll length ÷ drop length) and drops needed (wall width ÷ roll width) — closer to reality than dividing areas.
花纹回位是什么？What is the pattern repeat?
有图案的墙纸需要上下对花，每幅长度要取回位长度的整数倍，回位越大浪费越多。卷标上通常会注明回位（如 64 cm）。Patterned paper must line up between drops, so each drop is rounded up to a whole number of repeats; bigger repeats waste more. The label shows the repeat (e.g. 64 cm).
常见墙纸规格？Common roll sizes?
常见规格（示例值，以卷标为准）：欧洲常见卷 0.53 × 10.05 米（约 5.3 m²）；美国双卷约 20.5 英寸 × 33 英尺（约 56 ft²）。Common sizes (example values; check the label): a typical European roll is 0.53 × 10.05 m (about 5.3 m²) and a US double roll about 20.5 in × 33 ft (about 56 ft²).
修边余量是什么？What is the trim allowance?
每幅上下各留一点长度用于裁齐，默认每幅共 5 cm（示例值，可修改，填 0 表示不留）。每幅裁切长度 = 墙高（按花纹回位向上取整）+ 修边余量，每卷能裁几幅就按这个长度计算，结果中也会显示每卷剩下的短料。A little extra at the top and bottom of each drop for trimming. The default is 5 cm per drop (an example value; change it, or enter 0 for none). Cut length per drop = wall height (rounded up to the pattern repeat) + trim allowance, which sets how many drops a roll gives; the leftover per roll is shown too.
「墙纸用量计算器」免费吗？需要注册吗？Is the Wallpaper Calculator free? Do I need an account?
「墙纸用量计算器」完全免费，无需注册或安装，打开网页即可使用，手机和电脑都能用；输入的内容只在你的浏览器本地处理。The Wallpaper Calculator is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.