Calculate how many tiles you need for a floor or wall. Enter the area size and your tile dimensions to get the area, the tile count, and the recommended quantity including a waste allowance.
Enter the length and width of the surface to be tiled (in metres) and the dimensions of a single tile (in centimetres). Add a waste percentage to cover cuts and breakages.
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A tile calculator turns the size of your floor or wall and your tile dimensions into the number of tiles to buy, with a waste allowance for cuts, breakages and future repairs.
10% is standard for a straight lay. Allow 15% for diagonal patterns, 20% for herringbone or intricate layouts, and always keep spares.
For walls, subtract the area of large openings. For floors, small thresholds rarely matter against the waste allowance.