How to work out how many tiles you need
Area (m²) = length × width
Tile area (m²) = tile length (mm) × tile width (mm) ÷ 1,000,000
Tiles = area ÷ tile area × (1 + waste)
Tile area (m²) = tile length (mm) × tile width (mm) ÷ 1,000,000
Tiles = area ÷ tile area × (1 + waste)
Tiles per square metre
| Tile size | Tiles per m² |
|---|---|
| 100 × 100 mm | 100 |
| 200 × 100 mm (metro) | 50 |
| 300 × 300 mm | 11.11 |
| 600 × 300 mm | 5.56 |
| 600 × 600 mm | 2.78 |
| 1200 × 600 mm | 1.39 |
Waste: 10% for a straight lay, 15% for a herringbone or diagonal pattern, and more for small rooms with lots of cuts.
Worked example
A 3 m × 2.5 m floor is 7.5 m². With 600 × 300 mm tiles (0.18 m² each) that is 41.7 tiles, or 46 tiles with 10% waste: 8 boxes of 6.
Frequently asked questions
How many 600 × 300 tiles are in a square metre?
5.56 tiles. Each tile covers 0.18 m².
How many tiles do I need for 10 m²?
With 600 × 300 mm tiles, 55.6 tiles, or 62 with 10% waste.
How much extra tile should I buy?
10% for a straight pattern and 15% for diagonal or herringbone layouts, plus a few spares for future repairs.
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Last updated October 2026.