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🪟 DIY Tool

Tile Calculator

Estimate how many tiles you need for any floor, wall, roof, or backsplash — accounting for tile size, gap spacing, overlaps, wastage, and box quantities.

🪟 Enter your tile and area details — then click Calculate
Tile Size Dimensions of one individual tile
Area to Cover Total surface you need to tile
Gap & Options Grout spacing, box size, price
grout spacing · negative = overlap
extra tiles for cuts & breakage (10% standard)
tiles per box (optional)
$
Tiles Needed
tiles
Area to cover:
Tile area (with gap):
With wastage (10%):
Boxes needed:
Estimated cost:
Tiles (no waste):
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Layout Patterns

Choose a pattern before ordering — some use significantly more material

💡 Wastage tip: Standard linear grid = add 10%. Running bond or diagonal = add 15%. Herringbone = add 15–20%. Complex custom patterns = up to 25%. The calculator's wastage % field lets you set the right buffer.

Linear Grid
Most common · +10% waste
Running Bond
Offset rows · +10–15%
Diagonal (45°)
Diamond look · +15%
Herringbone
Angled elegance · +15–20%

Gap Size & Grout Spacing

Why gaps matter and how they affect your tile count

Tiled with Gap

Gap

Positive gap value: tiles spaced apart with grout filling the space. Standard: 1/16" to 1/2" (1.6 mm to 12 mm).

Tiled with Overlap

Overlap

Negative gap value: tiles overlap each other, like roof shingles or wood siding, to prevent water leakage.

Grout Line Guide

Floor or wall tiles are typically installed with gaps because tiles are often not perfectly uniform in shape — and would not fit tightly without gaps. These spaces are filled with grout (a form of concrete).

Gap size ranges from 1/16" to 1/2" (1.6–12 mm) depending on tile type, material, and design preference. Rectified tiles (precision-cut) can achieve smaller grout lines. For roofing or wood siding, a negative (overlap) value is used instead.

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Tile Installation Options

Size, material, and pattern affect your order quantity and project look

📐 Tile Size

Tile sizes range from small mosaics at 3/8" all the way up to 24×48" slab tiles. Square tiles are the most popular and easiest to install.

Large tiles make small rooms feel bigger with fewer grout lines, but produce more wastage due to cutting.

Small tiles add texture and reduce offcuts, but involve more grout and more installation time.

🔲 Layout Pattern

The most common is a linear grid — straight rows and columns of square or rectangular tiles.

Running bond (like brick) uses offset rows with a 2:1 length-to-edge ratio, using ~10% more material.

Herringbone uses tiles at 45° or 90° angles — beautiful but labour-intensive and requiring 15–20% more tiles.

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Ceramic & Porcelain

Most cost-effective, wide variety of styles. Porcelain is harder and more moisture-resistant than ceramic.

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Glass

Visually unique, ideal for kitchen and bathroom backsplashes. Not suitable for floors — cracks under pressure.

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Quarry Tile

Rough, grippy surface. Common outdoors and in restaurant kitchens. Excellent slip resistance when wet.

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Marble & Granite

Natural stone patterns and textures that are impossible to replicate with ceramics. Blends into grout for a unified look.

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Mosaic Tile

Small tiles (often 1–2") mounted on mesh. Highly customisable patterns. More grout lines mean more maintenance.

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Large Format Slab

24×48" or larger tiles for a seamless, modern look. Require precise subfloor preparation and professional-grade adhesive.