Tile calculator

How it is calculated

The area is increased by the waste allowance and divided by the area of one tile to get the number of tiles. Boxes come from the tiles per box or, if the box shows an area, from dividing by the area per box. Both numbers are rounded up, because you cannot buy half a tile or half a box.

Tiles = area × (1 + waste ÷ 100) ÷ area of one tile

Example

A 10 × 12 ft floor is 120 ft², or 132 ft² with 10 % waste. With 12 × 24 in tiles (2 ft² each) you need 66 tiles; at 8 tiles per box, that is 9 boxes.

In metric, a 4 × 3 m floor is 12 m², or 13.2 m² with 10 % waste. With 60 × 60 cm tiles (0.36 m² each) you need 37 tiles; at 4 per box, 10 boxes.

Limitations

Grout joints are not subtracted, so the result stays slightly on the safe side. For diagonal layouts or large tiles, raise the waste allowance. Boxes from different batches can differ slightly in shade, so buy them all at once.