📐 How to Calculate Tiles for Your Project
Accurate tile calculation prevents costly over-purchasing and frustrating shortages. This professional calculator accounts for surface area, tile dimensions, joint width, installation pattern, and waste factor to give you precise material quantities for any tiling project.
🔲 Tile Calculation
Tiles per row = Surface width ÷ (Tile width + Joint). Total tiles = Rows × Columns. Add waste factor (10-15%) for cuts and breakage.
🧴 Adhesive Estimation
Standard consumption: 5 kg/m² with 6mm notched trowel. For large format tiles (>60cm), use 6-8 kg/m² with 10mm notched trowel.
🎨 Grout Calculation
Grout volume depends on tile size, joint width, and tile thickness. The formula accounts for the cross-section of grout joints across the entire surface.
♻️ Waste Factor
Straight layout: +10%. Brick/offset: +12%. Diagonal: +15%. Complex rooms with many cuts may need up to 20% extra.
🏠 How to Calculate Calamine / Roofing Sheets
Corrugated metal roofing (calamine) calculation requires accounting for lateral and longitudinal overlaps, sheet direction, and waste factor. This calculator ensures you order the exact amount of material needed for your roofing project.
📏 Sheet Calculation
Sheets across = Roof width ÷ Effective sheet width. Sheets along = Roof length ÷ (Sheet length - Longitudinal overlap). Total = Across × Along + waste.
🔗 Overlap Calculation
Lateral overlap: 1.5 corrugations (≈15cm). Longitudinal overlap: 15-20cm minimum. Steeper slopes allow less overlap; flatter roofs need more.
🔩 Fastener Calculation
Standard: 8 self-drilling roofing screws per m² with neoprene washers. Place at every other corrugation crest on each purlin.
🔺 Ridge Cap & Accessories
Ridge caps: standard 2.44m with 10cm overlap. Also consider gutter flashing, wall flashing, and foam sealer strips.
📊 Tile Coverage Reference Table
| Tile Size |
Tiles/m² |
Adhesive kg/m² |
Common Use |
| 20×20cm | 25 | 4-5 | Bathroom walls |
| 30×30cm | 11 | 4-5 | Walls, backsplash |
| 45×45cm | 5 | 5-6 | Standard floors |
| 60×60cm | 2.8 | 5-7 | Living rooms, hallways |
| 80×80cm | 1.6 | 6-8 | Large format, commercial |
📊 Corrugated Roofing Sheet Reference
| Sheet Type |
Length |
Coverage/sheet |
Best Use |
| Zinc Corrugated | 2.44-6m | ~0.85m²/m | Economy roofing, sheds |
| Pre-painted Galvanized | 2.44-12m | ~0.85m²/m | Residential, commercial |
| Standing Seam | Custom | ~0.45m²/m | Premium, architectural |
| Tile Effect Metal | 2.20-3.6m | ~1.0m²/m | Aesthetic, traditional look |
📖 Types of Tiles and Where to Use Them
🏺 Ceramic Tiles
Most affordable option. Best for walls and low-traffic areas. Water absorption: 3-6%. Available in many colors and sizes.
💎 Porcelain Tiles
Denser and more durable. Water absorption: <0.5%. Ideal for floors, outdoor areas, and commercial spaces. Higher cost but longer lasting.
🪨 Natural Stone
Marble, granite, travertine. Unique patterns. Requires wider joints (5-10mm) and sealing. Premium price point.
🎯 Mosaic Tiles
Small format tiles on mesh backing. Perfect for decorative accents, shower floors, and backsplashes. Higher grout consumption.