Planning a kitchen backsplash, bathroom shower renovation, or porcelain floor tiling project requires determining exact tile quantities while ordering sufficient overage for cutting waste, perimeter edge trims, and tile breakage. This calculator converts room dimensions into individual tile counts and sealed cartons needed, including a recommended cutting allowance.

### Tile Estimation Formulas The calculator evaluates surface area and tile packaging through standard trade equations: - **Single Tile Area (sq ft):** `tileSqFt = (tileLengthInches × tileWidthInches) / 144`. For example, a standard 12×12 inch ceramic tile covers exactly 1.0 square foot. - **Total Area with Waste Factor:** `totalAreaWithWaste = areaSqFt × (1 + wastePercent / 100)`. Straight grid layouts typically require a 10% waste allowance, while diagonal, herringbone, or chevron patterns require 15% to 20% to account for corner diagonal cuts. - **Gross Tile Count:** `tilesNeeded = ceil(totalAreaWithWaste / tileSqFt)`. - **Cartons / Boxes Required:** `boxesNeeded = ceil(tilesNeeded / tilesPerBox)`.

### Worked Construction Example Suppose you are tiling a 120 square foot bathroom floor using 12×12 inch porcelain tiles packaged 10 tiles per carton, with a standard 10% waste factor: 1. Gross coverage area needed: `120 × 1.10 = 132 sq ft`. 2. Area per tile: `(12 × 12) / 144 = 1.0 sq ft`. 3. Total tiles required: `ceil(132 / 1.0) = 132 tiles`. 4. Boxes needed: `ceil(132 / 10) = 14 boxes` (containing 140 tiles total, leaving 8 extra whole tiles for future tile replacements or plumbing repairs).

### Client-Side Privacy Notice All square footage, tile carton, and cutting waste calculations run locally in your web browser. No room dimensions, project budgets, or home remodeling data are transmitted across the internet.