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Tile Calculator

Instant tile quantity estimate from room dimensions

タイル情報を入力

3 mm
10%

計算結果

必要枚数
必要ケース数
ケース
部屋面積 — m²
タイル面積(目地込) — cm²
余り枚数
購入面積 — m²
有効余裕率 —%

目地込みタイル寸法:

※ 参考値です。切り欠きが多い場合はさらに余裕をお持ちください。

About Tile Calculator

The Tile Calculator helps you quickly determine how many tiles and cases to order for floor or wall tiling projects, whether you're doing a DIY renovation or planning a professional installation. Enter the room width and depth in meters, choose a tile size from the presets or enter a custom size, and the tool instantly calculates the exact quantity needed — factoring in both grout width and a waste overage percentage.

Select a layout pattern — grid, brick, 45° diagonal, or herringbone — and industry-standard overage recommendations are automatically applied. Grid layout uses 10% overage, diagonal adds 15%, and herringbone adds 20%. The tool always applies whichever is larger: your manual input or the pattern-based recommendation. This ensures adequate allowance for cuts, breakage, and waste.

Built-in presets cover the most common tile sizes (100×100mm up to 600×600mm, plus rectangular options like 300×600mm and 200×400mm). Enter the number of tiles per box or case, and you'll immediately see how many cases to buy and how many spare tiles you'll have left over.

Optionally enter the tile price per m² to see an estimated material cost. The total purchase area in m² is also displayed alongside the cost breakdown, making it straightforward to plan budgets and place accurate orders with suppliers.

All calculations run entirely in your browser — no data is sent to any server.

How to use Tile Calculator

  1. Enter the room width and depth in meters in the corresponding fields.
  2. Select a tile size preset, or choose 'Custom' to enter the tile width and height in centimeters manually.
  3. Choose a layout pattern from the dropdown: grid (10%), brick (12%), 45° diagonal (15%), or herringbone (20%). The recommended overage for that pattern is automatically applied.
  4. Adjust the grout width slider (mm) and the overage slider (%) to account for cuts and breakage. If your manual overage is higher than the pattern recommendation, your input is used instead.
  5. Enter the number of tiles per case to see how many cases to buy and how many spare tiles you'll have. Optionally enter the tile price per m² to see the estimated material cost.

Benefits of Tile Calculator

  • Pattern-based overage recommendations help apply a realistic spare rate for grid, brick, diagonal, or herringbone layouts.
  • The tool compares manual overage with the pattern recommendation and applies the higher value to reduce under-ordering.
  • Built-in presets for major tile sizes save time and reduce width or height entry mistakes.
  • Cases needed, spare tiles, purchase area, and estimated material cost appear together for ordering plans.
  • Browser-only processing keeps renovation project details on your device.

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