Tile Calculator
Find how many tiles you need for a floor or wall, including waste.
Results update as you type.
About this calculator
A tile calculator divides the area you are covering by the size of one tile to find how many tiles you need, then adds a waste allowance for cuts and breakages. Enter the room dimensions and the tile size — the calculator handles the unit conversion between the room and the tiles.
Frequently asked questions
How many tiles do I need?
Divide the total area by the area of one tile, then add a waste margin. A 4×3 m floor is 12 m²; with 30×30 cm tiles (0.09 m² each) that is about 134 tiles, or 147 once a 10% waste allowance is added.
How much waste should I allow for tiles?
A 10% allowance is normal for straight layouts, rising to 15–20% for diagonal patterns or rooms with many cuts. The extra covers breakages and off-cuts, and leaves spares for future repairs.
How much waste should I allow for tiles?
A 10% allowance is normal for straight layouts, rising to 15–20% for diagonal patterns or rooms with many cuts. The extra covers breakages and off-cuts, and leaves spares for future repairs.
Results are estimates for general guidance only, not financial, medical or tax advice.