Basic formula
Number of tiles = Floor area ÷ tile area, followed by an appropriate allowance for cuts and breakage.
Worked example
For 20 m² using 600 × 600 mm tiles, one tile covers 0.36 m². Basic quantity is about 56 tiles before allowance. A 10% planning allowance gives about 62 tiles.
How to use the calculator
Enter floor dimensions and tile dimensions. Review the result and allowance used by the calculator.
Common mistakes
Convert millimetres correctly, consider room shape and avoid ordering exactly the mathematical minimum.
Spare tiles
Keeping a small quantity for future repairs can be useful.
Use the Tile Quantity Calculator
Enter your project values and get a quick preliminary calculation.
Engineering note: Results are intended for preliminary estimation, planning and learning. Verify measurements, drawings, specifications, current rates, applicable standards and site conditions before construction or safety-critical decisions.
Frequently Asked Questions
How are tiles calculated?
Divide floor area by the area of one tile and add a suitable allowance.
How much wastage should I allow?
Often 5–10% is used as a planning range, but the actual project determines the allowance.
Should I keep spare tiles?
It can be useful for future repairs.
Does it model patterns?
No; it is primarily an area-based estimate.