How Many Wall Tiles Do I Need for a Bathroom?
Quick Answer
~100–120 tiles (300 × 600mm) for a typical bathroom plus 10% wastage
Based on: 2.5m × 2m bathroom, 4 walls tiled to 2.4m height, 300 × 600mm tiles with 2mm grout joints
How We Calculated This
Bathroom wall tiles are calculated by dividing the total wall area by the area of each tile:
- Room perimeter: (2.5 + 2) × 2 = 9m
- Wall area: 9 × 2.4 = 21.6m²
- Deduct door (~1.6m²) and window (~0.5m²) = ~19.5m²
- Tile area: 0.3 × 0.6 = 0.18m² per tile
- Tiles needed: 19.5 ÷ 0.18 = ~108 tiles
- Plus 10% wastage: 108 × 1.1 = ~119 tiles
Common UK Bathroom Tile Sizes
- 300 × 600mm: Most popular wall tile size, 5.6 tiles/m²
- 250 × 400mm: Traditional size, 10 tiles/m²
- 600 × 300mm (landscape): Modern look, 5.6 tiles/m²
- 100 × 200mm (metro): Trendy, 50 tiles/m²
- 600 × 600mm: Large format, 2.8 tiles/m²
Wastage Allowance
- Straight lay: 10% wastage
- Brick bond / offset: 10–12% wastage
- Diagonal / diamond: 15% wastage
- Herringbone: 15–20% wastage
- Complex patterns / small rooms: 15% wastage
Part-Height vs Full-Height Tiling
If tiling to half-height only (1.2m), you need roughly half the tiles. In wet areas (around the bath and shower), always tile to full height for waterproofing. Building regulations require waterproof surfaces in shower enclosures and above baths.
Tips
Buy all tiles from the same batch to avoid shade variation. Keep spare tiles for future repairs. Use a tile cutter for straight cuts and a tile nibbler or angle grinder for curves around pipes. Use flexible adhesive and grout in areas subject to movement (e.g., around baths).