Tile Calculator
Use our free tile calculator to work out exactly how many tiles you need for any room or surface. Enter your measurements below to get instant results, including a recommended waste allowance.
How to Calculate How Many Tiles You Need
This tile calculator converts your millimetre measurements to square metres — the same method used by tilers and DIYers across Australia. Here's how it works:
- Measure your space: Measure the length and width of the area in millimetres. For L-shaped or irregular rooms, break the space into rectangles, calculate each section separately, and add the totals together.
- Calculate the area: Multiply length by width — the calculator converts your mm measurements to m² automatically. For example, a 4000mm × 5000mm room equals 20m².
- Add a waste factor: Always order more tiles than your exact area to account for cuts, breakage, and future repairs.
- Calculate boxes required: Divide your total m² (including waste) by the m² coverage per box listed on the product.
Waste Allowance Guide
| Layout Type | Recommended Waste |
|---|---|
| Straight / standard layout | 10% |
| Diagonal or complex layout | 15% |
| Herringbone or intricate pattern | 30% |
This calculator automatically applies the right waste factor based on your chosen layout, so you can order with confidence.
Not Sure Where to Start?
Once you have your m² figure, browse our full range of tiles and installation supplies to find the right product for your project. Each product listing includes the m² coverage per box to help you understand the amount you require.
Need a hand measuring up or choosing the right tile? Contact us today: