Check the tile layout before rounding up boxes

Measure the tiled surfaces, then decide how tiles are arranged across them. Two floors with the same area can require different purchase quantities because their dimensions, patterns and edge cuts differ.

Establish the net area

An illustrative 3.2 × 2.4 m floor is 7.68 m². If the selected layout allowance were 8%, the order basis would be 8.2944 m². At an example 1.44 m² per box, that rounds to six boxes, providing 8.64 m². The 8% is a scenario, not a universal tile allowance.

Sketch the edges

Mark the starting line, direction and cut rows. Decide whether a cut from one side can genuinely be reused elsewhere, considering the pattern and cut edge. Diagonal layouts, niches and small returns can make a uniform percentage less informative than a tile-by-tile sketch.

Check what the box covers

Use the supplier's stated box coverage and the actual product dimensions. Nominal size, joint width and manufacturing dimensions can differ. For patterned products, record the pack composition and any minimum repeat needed.

Include the rest of the system

Backer boards, trims, adhesive, grout and movement joints belong in separate entries. Their quantities are not fixed percentages of the tile box count. Confirm substrate preparation and the installation system before ordering. An area calculator cannot establish that a surface is suitable for tiling or that the proposed joint arrangement is adequate.

Found a measurement or calculation issue? Send the example and your correction.