実用

Wallpaper Calculator

Room length (m)

Room width (m)

Ceiling height (m)

Number of doors

Number of windows

ロール幅（m）

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Detailed Guide Coming Soon

We're working on a comprehensive educational guide for the Wallpaper Calculator in your language. The content below is shown in English.

とは何か Wallpaper Calculator?

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A wallpaper calculator determines how many rolls of wallpaper are required to cover a room's walls, accounting for door and window spaces and the pattern repeat that requires extra paper for alignment.

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方法 Wallpaper Calculator

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1Calculate total wall area: perimeter × wall height
2Subtract door and window areas (approximately 2m² per door, 1.5m² per average window)
3Add pattern repeat waste: if repeat is 64cm and roll is 10m, you lose ~6% per drop
4Divide adjusted area by usable area per roll (roll width × usable length)

解いた例

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例 1

入力:Room 4m×4m · height 2.5m · 2 doors · 1 window

結果:7–8 rolls (standard 10m×530mm rolls)

Wall area ≈ 32m² net

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プロのヒント

Always buy one roll more than calculated — pattern-matching means you often cannot return to buy the same dye lot months later.

参考文献

›Wallpaper — Wikipedia

Wallpaper Calculator