部屋面積計算機
長方形またはL字型の部屋の床・壁・天井の面積を計算。
Room measurements
Floor area
Wall area
Ceiling area
Total surface area (all surfaces)
How to use
- Enter the room's length and width in feet (measure to the interior walls).
- Enter the ceiling height — standard homes are 8 ft, some have 9 ft or higher.
- Results show floor, wall, and ceiling area plus total surface area.
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よくある質問
- Is this tool free?
- Yes, completely free with no signup required.
- Does my data leave my device?
- No. All calculations happen in your browser — nothing is sent to a server.
- Does it work on mobile?
- Yes. The tool is mobile-first and works on any modern browser.
Last updated: By jarvisbox