Tile Calculator
Enter the size of the surface and the size of your tiles to find out how many tiles — and how many boxes — you need to buy, with a wastage allowance for cuts and breakage.
Surface and tile size
How this is calculated
The surface area (width × length) is divided by the area of a single tile to get the raw number of tiles needed, then the wastage percentage is added on top and the result is rounded up — you can't buy part of a tile, so this calculator always rounds in your favor rather than leaving you short. If you enter tiles per box, it also rounds up to the nearest full box, since most tile suppliers don't split boxes.
Almost every tiling job involves cutting tiles to fit around edges, pipes, and corners — those cut-off pieces are often unusable, and a few tiles typically break during handling or cutting. Buying extra also means you have matching spares if a tile ever cracks later.
Calculate each surface separately — run the calculator once for the floor and again for each wall you're tiling, since they're usually different sizes and sometimes different tiles.
No — grout lines are thin enough that they don't meaningfully change the tile count for most tile sizes, and the wastage allowance comfortably absorbs the small difference.