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Tile calculator

Enter the area, the size of each tile and how many come in a box. You see how many tiles and boxes to buy.

The waste allowance covers cuts at the edges and the odd broken tile.

How it's calculated

Area of one tile = length × width, converted to square metres.
Tiles = area × (1 + waste ÷ 100) ÷ area of one tile, rounded up.
Boxes = tiles ÷ tiles per box, rounded up.

An example

For 20 m² with 60 × 60 cm tiles (0,36 m² each) and 10% waste, you need 62 tiles.

If a box holds 4 tiles, that is 16 boxes.

Frequently asked questions

How much waste should I allow?

10% for a straight layout. For diagonal or herringbone patterns, or rooms with lots of cuts, 15% to 20%.

Do I need to account for grout lines?

No. Grout lines are a few millimetres wide and the waste allowance already covers the difference.

Should I buy extra?

Yes, a few spare tiles from the same batch. If one breaks later, it can be hard to match the shade.

Key terms

Waste allowance: The extra percentage you buy for cuts and breakage.
Batch: The production run. Tiles from different batches can vary slightly in shade.

The same calculation in other countries

Up-to-date official data

We check the official sources automatically, every day.

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