Tile Quantity Calculator

10% is a reasonable default for a simple rectangular room. Add more — 15% or higher — for diagonal layouts, herringbone patterns, or rooms with a lot of cuts around fixtures, pillars or alcoves.

Split it into rectangles (an L-shaped room is two rectangles), calculate each one separately, and add the areas together before working out tiles and boxes.

No — a tile's listed size (e.g. 600 × 600mm) is its actual physical size, and grout width is a separate, usually small, addition. For most rooms this is within the wastage margin already built in.

It's printed on the box itself, or your tile retailer can tell you before you buy — it varies by tile size and brand.

No. Every calculation happens in your browser. Nothing you type here is sent to our servers.