Tile Calculator

Enter the area you are tiling and your tile size to get the number of tiles required, plus extra for cuts and breakages. Tiles are specified in millimetres on every product page, so this calculator takes tile dimensions in mm.

Enter your measurements

Your tiles result will appear here instantly.

How to use this calculator

1
Measure the length and width of the floor or wall area in metres or centimetres.
2
Find the tile size on the product page — Australian tiles are listed in millimetres, e.g. 600 × 600.
3
Keep the waste allowance at 10% for straightforward layouts in square rooms.
4
Increase to 15% for diagonal, brick-bond or herringbone layouts, or rooms with many corners and alcoves.
5
Always buy from the same batch — check the shade and calibre codes on the boxes match.

How the calculation works

Area ÷ tile area

We divide the total area by the area of a single tile to get the exact number of tiles needed, then round up — you cannot buy part of a tile.

Waste allowance

The waste percentage adds extra tiles for cuts, breakages, awkward corners and future spares. It is applied on top of the exact count before rounding up.

Worked example

A bathroom floor measuring 2.4 m × 1.8 m with 600 × 600 mm tiles and 10% waste.

Floor area = 4.32 m². One tile = 0.6 × 0.6 = 0.36 m².

4.32 ÷ 0.36 = 12 tiles exactly. With 10% waste: 12 × 1.1 = 13.2, rounded up to 14 tiles.

Buy 14 tiles — if they are sold by the box of 4, that means 4 boxes.

Frequently asked questions

How much waste allowance should I add?

10% suits most straight-lay patterns in simple rectangular rooms. Use 15% for diagonal, herringbone or basketweave patterns, small bathrooms with lots of cuts, or when tiling around many fixtures. Keep one or two spare tiles after the job for future repairs.

Why do I need to buy from the same batch?

Ceramic and porcelain tiles vary slightly in colour shade and size between production runs (the shade and calibre codes printed on each box). Mixing batches can produce a visible patchwork, and slightly different sizes can make even spacing impossible.

Can I use this for wall tiles?

Yes. Measure the wall's length and height instead of the floor. For showers, measure each wall you plan to tile separately, and remember to subtract window and door openings where they interrupt the tiling.