Construction/Home calculator
Tile Calculator
Estimate how many tiles are needed from floor area, tile size, and waste allowance.
Formula
Tile quantity formula
Tile estimates should account for cuts, breakage, layout pattern, and spare replacement tiles.
Tiles needed = floor area x (1 + waste %) / tile area
For 20 sq m with 0.36 sq m tiles and 10% waste, buy about 62 tiles.
FAQs
What waste percentage should I use?+
Many projects use 5-15%, depending on layout complexity and tile size.
Does this include grout?+
No. It estimates tile count only.
How does the Tile Calculator calculate the result?+
It uses the Tile quantity formula: Tiles needed = floor area x (1 + waste %) / tile area. For 20 sq m with 0.36 sq m tiles and 10% waste, buy about 62 tiles.
What information do I need to use the Tile Calculator?+
Estimate how many tiles are needed from floor area, tile size, and waste allowance.
How accurate is the Tile Calculator?+
Tile Calculator applies the formula and assumptions shown on this page. Results may be rounded for readability, so verify changing rates, thresholds, medical guidance, or legal rules with the cited source or a qualified professional.
What should I check before using the Tile Calculator result?+
Check that the units, dates, rates, and assumptions match your situation. Change one input at a time to understand which values have the largest effect on the result.
Construction/Home guide
How to use the Tile Calculator
Estimate how many tiles are needed from floor area, tile size, and waste allowance. The page also explains the tile quantity formula and shows a practical example: For 20 sq m with 0.36 sq m tiles and 10% waste, buy about 62 tiles.
- 1
Enter your details
Enter floor area, tile size, and waste allowance, then complete any other fields shown in the calculator.
- 2
Check the calculation
Review the result alongside the tile quantity formula: Tiles needed = floor area x (1 + waste %) / tile area.
- 3
Compare scenarios
Change one or more inputs to see how they affect the tile Calculator result before you use the estimate.
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