Tile Calculator
Work out how many tiles you need for a floor or wall, including a wastage allowance for cuts and breakage.
How this is calculated
Room area ÷ tile area gives the base number of tiles to cover the floor exactly. A wastage percentage is then added on top to account for cuts around edges, breakage, and future repairs — the result is rounded up to a whole tile.
Worked example
A 6m × 4m room (24 sq m) tiled with 0.6m × 0.6m tiles (0.36 sq m each) needs 24 ÷ 0.36 ≈ 66.7 tiles at minimum. With a 10% wastage allowance, that rounds up to 74 tiles.
Frequently asked questions
How much wastage allowance should I use?
10% is a common default for simple rectangular rooms. Rooms with an irregular layout, diagonal tile patterns, or lots of cuts around fixtures often need 15–20% to be safe.
Should I round up or down?
Always round up — buying slightly more ensures you have matching tiles from the same batch if you need extras later, since dye lots can vary between production runs.