How Many Roof Tiles per m² Calculator
If you're working in metric units, knowing how many roof tiles per m2 your chosen tile covers is essential for accurate ordering. Tile coverage rates vary significantly between tile types, and using m² ensures compatibility with metric architectural plans and international building standards.
Most roof tiles require 10–25 tiles per m². Concrete flat tiles: ~12/m². Clay barrel tiles: ~15/m². Small flat clay tiles: ~25/m².
Tile Coverage Rates in m²
| Tile Type | Tile Size (mm) | Coverage per Tile (m²) | Tiles per m² | Weight per m² |
|---|---|---|---|---|
| Concrete Flat Tile | 330 × 420 | 0.080 | ~12.5 | 42–54 kg |
| Clay Barrel (S-Tile) | 254 × 330 | 0.067 | ~15.0 | 40–48 kg |
| Flat Clay Tile | 165 × 254 | 0.040 | ~25.0 | 38–45 kg |
| Natural Slate | 305 × 457 | 0.093 | ~10.8 | 28–44 kg |
| Interlocking Concrete | 330 × 420 | 0.093 | ~10.8 | 40–50 kg |
| Large Format Concrete | 380 × 450 | 0.114 | ~8.8 | 38–45 kg |
The Metric Calculation Formula
Measure roof length and width in meters. Add 0.3–0.5 m per side for overhangs.
Length × Width × Pitch Multiplier = Roof Area in m².
Use the table above for your tile type.
Add 10–15% for cuts and breakage.
Imperial ↔ Metric Quick Conversions
| Imperial | Metric |
|---|---|
| 1 sq ft | 0.0929 m² |
| 1 foot | 0.3048 m |
| 100 sq ft (1 square) | 9.29 m² |
| 1 m² | 10.76 sq ft |
Worked Example — 120 m² Roof with Clay Barrel Tiles
Frequently Asked Questions
How many roof tiles per m2 for a concrete tile?
Standard concrete flat tiles require approximately 12–13 tiles per m². Large format concrete tiles require fewer — around 9 per m².
Can I convert m² to imperial squares?
Yes. 1 roofing square = 9.29 m². Divide your roof area in m² by 9.29 to get imperial roofing squares.
Working with Shingles Instead?
Our roof shingle calculator supports both feet and meters — switch units with one click.
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