Splashback Tile Calculator — How Many Tiles for a Splashback?
Calculate tiles, adhesive, grout and edge trim for kitchen and bathroom splashbacks. Includes wastage allowance and socket cutouts.
Total width of the splashback area
Height above worktop (typically 0.45-0.6m)
300x75mm metro — 300mm x 75mm
Number of power sockets to tile around
Adds 5% extra tiles for cutting around a window
Enter your tile price for a cost estimate
How We Calculate This
Our splashback tile calculator divides your splashback area by the individual tile area to determine the number of tiles needed, then adds allowances for wastage, socket cutouts, and window cutouts.
The formula
Splashback area = Width × Height
Tiles needed = Area ÷ Individual tile area (rounded up)
Total tiles = (Tiles + Socket extras + Window extras) × 1.10 (10% wastage)
Material coverage rates
- Tile adhesive: ~2.5 kg/m² for wall tiles (6mm notched trowel)
- Grout: 0.3-0.8 kg/m² depending on tile size and joint width
- Edge trim: Top width + both side heights
Tile sizes available
- 100 x 100mm: Small square tiles — retro or mosaic look
- 150 x 150mm: Classic 6" square tile
- 200 x 100mm: Brick bond pattern
- 300 x 75mm: Metro / subway tile — the UK favourite
- 600 x 300mm: Large format — fewer grout lines
We add 1 extra tile per socket cutout and 5% extra if tiling around a window. The 10% standard wastage accounts for cuts, breakages and pattern matching.
Frequently Asked Questions
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Last updated: February 2026
All calculations are estimates. Verify with your supplier.