Tile Calculator: How Many Tiles Does Your Floor Need?
Enter the room size and the tile size in millimetres. The calculator gives the number of tiles and boxes with a wastage allowance, and the adhesive you will need.
Estimates only. Check important results before you rely on them.
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From related categoriesHow to use this calculator
- Enter the room length and width.
- Enter the tile size in millimetres. A 2 ft × 2 ft tile is 600 × 600.
- Set the wastage and the number of tiles per box.
- Read the tiles, boxes and adhesive.
The formula
Worked example
A 12 ft × 10 ft floor is 11.15 m² (120 sq ft). A 600 × 600 mm tile covers 0.36 m². With 10% wastage you need 35 tiles, which is 9 boxes of 4 or 36 tiles, and about 45 kg of adhesive (3 bags of 20 kg).
Understanding your result
The tool rounds up to whole boxes, so you will have a few spare tiles for future repairs. Keep spares from the same batch because colours can vary between batches.
When to use it
- Order the right number of tiles and boxes.
- Compare layouts and tile sizes.
- Estimate adhesive for fixing.
In-depth guide
How many 600 × 600 mm tiles for common rooms
The table uses a 600 × 600 mm tile (0.36 m²) with 10% wastage, rounded up to full tiles.
| Floor area | Floor area (m²) | Tiles needed |
|---|---|---|
| 60 sq ft | 5.6 m² | 18 |
| 100 sq ft | 9.3 m² | 29 |
| 120 sq ft | 11.1 m² | 35 |
| 150 sq ft | 13.9 m² | 43 |
| 200 sq ft | 18.6 m² | 57 |
| 300 sq ft | 27.9 m² | 86 |
Why you need extra tiles
Cuts along walls, breakage in handling and odd corners all use tiles. A straight layout on a simple room usually needs about 5 to 7% extra. Diagonal layouts, patterned tiles and rooms with many corners need 10 to 15%. Keep a few spare tiles for future repairs, because a later batch can differ slightly in shade.
Choosing the tile size
- Larger tiles mean fewer joints and a cleaner look but more cutting waste in small rooms.
- Smaller tiles suit bathrooms and balconies where the floor slopes to a drain.
- Check the nominal size on the box. Rectified tiles are cut square and can use thinner grout lines.
Adhesive, grout and other materials
The calculator estimates adhesive at about 4 kg per m², which is typical for a thin bed. Grout, spacers, skirting and waterproofing are not included. Ask your supplier for the coverage printed on the adhesive bag, because it depends on the product and on the flatness of the base.
Before you order
- Measure each room separately and add them up.
- Round up to whole boxes, not single tiles.
- Buy all tiles from one batch.
- Confirm the quantity with your tile fitter or engineer.
Assumptions and limits
These are planning estimates. Real use depends on material quality, site conditions and workmanship. Confirm quantities with your engineer or contractor before ordering. Adhesive use depends on the product and the sub-floor. Grout, spacers and skirting are not included.
Frequently asked questions
How many tiles do I need for 100 sq ft?
With 600 × 600 mm tiles and 10% wastage, about 29 tiles.
What wastage is normal for tiles?
10% for straight layouts and 15% for diagonal or patterned ones.
What size is a 2 × 2 ft tile in mm?
About 600 × 600 mm.
How much tile adhesive do I need?
About 4 kg per m² for standard thin-bed fixing. Check the product label.
Should I buy extra tiles?
Yes. Keep a box for repairs, from the same batch.