Trades & DIY
Tile, Adhesive & Grout Estimator
Enter the area and tile size to get tiles, boxes, adhesive bags and grout in one go.
- Area
- 7.20 m²
- Tiles needed
- 44
- Boxes to buy
- 8
- Adhesive
- 32.4 kg · 2 × 20kg bags
- Grout
- 1.6 kg · 1 × 2.5kg bags
- Tile cost
- £176.00
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How the tile calculation works
Tiles: area × (1 + waste %) ÷ tile face area, rounded up, then divided by tiles per box and rounded up again.
Adhesive: a notched trowel leaves ridges that compress to roughly half the notch depth. Most cement-based adhesives use about 1.5 kg per m² per mm of bed, so a 6mm notch uses ~4.5 kg/m².
Grout uses the industry formula kg = (L + W) ÷ (L × W) × tile depth × joint width × 1.6 × area with dimensions in mm and 1.6 as the typical grout density.
Choosing a trowel
Larger tiles need a thicker bed for full coverage. For floor tiles over 300mm, back-butter the tile as well and add around 20% more adhesive. Always check the manufacturer's coverage figures on the bag.
Common UK tile sizes
| Tile (mm) | Tiles per m² | Typical use |
|---|---|---|
| 100 × 100 | 100.0 | Splashbacks, mosaics |
| 200 × 100 | 50.0 | Metro / subway walls |
| 250 × 400 | 10.0 | Bathroom walls |
| 300 × 300 | 11.1 | Floors |
| 600 × 300 | 5.6 | Walls & floors |
| 600 × 600 | 2.8 | Large floors |
| 1200 × 600 | 1.4 | Large format |