How many tiles per square metre? 30x30, 60x60 and other sizes
With a 3 mm grout line, a 60 x 60 cm tile covers 0.363 m², so you need about 2.75 tiles per square metre; a 30 x 30 cm tile comes to 10.9 per square metre. For a 10 m² floor in 60 x 60 that is 27.5 tiles exactly and 31 once you add 10% for cuts. The full table of sizes is below.
Tiles per square metre by size
Each tile occupies its own size plus one grout joint on two sides. The count is one square metre divided by that cell. The second column ignores the grout, which is what most quick rules of thumb do; the difference matters mostly for small tiles.
| Tile size | Per m² (3 mm grout) | Per m² (no grout) |
|---|---|---|
| 10 x 10 cm | 94.26 | 100 |
| 20 x 20 cm | 24.27 | 25 |
| 30 x 30 cm | 10.89 | 11.11 |
| 30 x 60 cm | 5.47 | 5.56 |
| 45 x 45 cm | 4.87 | 4.94 |
| 60 x 60 cm | 2.75 | 2.78 |
| 60 x 120 cm | 1.38 | 1.39 |
| 80 x 80 cm | 1.55 | 1.56 |
| 20 x 120 cm | 4.09 | 4.17 |
What to order for a 10 m² floor
Multiply the count by your area, then add waste. The tile calculator also converts the total into boxes when you enter how many tiles come in a box.
| Tile size | Exact | Order with 10% (straight) | Order with 15% (diagonal / pattern) |
|---|---|---|---|
| 10 x 10 cm | 942.6 | 1037 | 1084 |
| 20 x 20 cm | 242.7 | 267 | 280 |
| 30 x 30 cm | 108.9 | 120 | 126 |
| 30 x 60 cm | 54.7 | 61 | 63 |
| 45 x 45 cm | 48.7 | 54 | 57 |
| 60 x 60 cm | 27.5 | 31 | 32 |
| 60 x 120 cm | 13.8 | 16 | 16 |
| 80 x 80 cm | 15.5 | 18 | 18 |
| 20 x 120 cm | 40.9 | 46 | 48 |
Choosing the waste allowance
- 10%: straight lay, rectangular room, medium tiles. Covers the cuts along two walls and a few breakages.
- 15%: diagonal, herringbone or brick-bond patterns, L-shaped rooms, or tiles 60 cm and larger where each cut wastes a large offcut.
- More if the room has many alcoves, pipes and door thresholds, or if the tile is a natural stone with visible faults you will want to reject.
Measuring the area
Measure the floor to the walls, not to the skirting, and add any area under a bath panel or appliance you plan to tile. For walls, measure each wall separately and subtract windows and doors. Split odd shapes into rectangles and add them up, or use the 3D room planner, which lets you draw the outline and counts the floor tiles for you.
Frequently asked questions
- How many 60x60 tiles in a square metre?
- About 2.75 with a 3 mm grout gap (2.78 if you ignore the grout). Round up to 3 per square metre and then add waste for cuts.
- How many 30x30 tiles in a square metre?
- About 10.9 with a 3 mm grout gap, or 11.1 without it. Boxes are often sold by area, so check the m² printed on the box as well.
- How much extra should I order for tiles?
- 10% for a straight lay in a rectangular room, 15% for diagonal or herringbone patterns, rooms with many corners, or large-format tiles where every cut wastes a big piece. Also keep one spare box for future repairs: the same tile bought later may come from a different batch with a slightly different shade.
- Does the grout width change the count?
- Slightly for large tiles and a lot for small ones. A 3 mm joint adds about 1% to the cell of a 60 x 60 tile but about 6% to a 10 x 10 mosaic, which is why the small sizes differ most between the two columns.
Last updated 2026-09-11. Figures are planning estimates from typical product data: check the yield, size or coverage printed on what you buy and round up.