How it works
Each tile covers its own size plus one grout gap in each direction. Tiles = area ÷ (tile + gap area), then the waste allowance is added and the result rounded up.
Use 10% waste for straight layouts and around 15% for diagonal or herringbone patterns, where there are more cuts. Buy all tiles from the same batch to avoid shade differences.
FAQs
How many 600 × 300 tiles in a square metre?
About 5.5 tiles before grout gaps and waste.