Tile Calculator
Calculate how many tiles you need to tile a surface based on its size and a waste margin for breakage and cuts.
How is it calculated?
Area of one tile = (length in cm ÷ 100) × (width in cm ÷ 100). Tiles needed = (surface to cover × (1 + waste %)) ÷ tile area, rounded up. A 10% waste margin is common to cover breakage and corner cuts.
Examples
20 m² with 60×60 cm tiles and 10% waste
You need 62 tiles.
12 m² with 30×30 cm tiles and 15% waste
You need 154 tiles.
How to calculate the tiles you need
Divide the surface with margin by the area of one tile. With 20 m², 60 × 60 cm tiles and 10% waste, you need 62.
If your supplier sells by box with the m² each one covers, it's more practical to calculate with the flooring calculator. For walls, measure each one and add them up; subtract doors and windows. Always start with square meters.
| Format | Tiles per m² |
|---|---|
| 30 × 30 cm | 11.1 |
| 60 × 60 cm | 2.8 |
| 20 × 60 cm | 8.3 |
How much waste margin to leave by format
The bigger the tile, the more material is lost on every corner cut — that's why it's worth raising the margin with XL formats. If you're also tiling a bathroom with a shower tray, calculate the paint separately if you're painting the rest of the wall.
| Situation | Recommended margin |
|---|---|
| Square tile, straight layout | 8-10% |
| Large rectangular format or herringbone | 12-15% |
| Room with many corners or drains | 15-20% |