Tile Flooring Calculator
Enter your room dimensions, tile size and a waste percentage to calculate how many tiles to buy.
Tile Flooring Calculator
Calculate how many tiles you need for a room based on its area, tile size and a waste allowance.
This is an estimate for general informational purposes only. Always round up to the next whole tile when purchasing, and check with your supplier for exact box quantities.
Tiling a room needs more tiles than the bare floor area suggests, since cuts around edges and breakage waste some material. This calculator adds a waste percentage to your room’s area, then divides by the size of a single tile to estimate how many you need.
Example
- With the default values shown above, this calculator returns: Room Area ≈ 120.0; Area Including Waste ≈ 132.0; Tiles Needed ≈ 66.0.
Frequently Asked Questions
How much waste allowance should I use?
A common guideline is 10% for simple layouts, rising to 15-20% for diagonal layouts, small or irregular rooms, or patterns that require more cutting.
Should I round the tile count up or down?
Always round up to the next whole tile — and ideally add a few extra for future repairs, since matching tile batches later can be difficult.