Tile Calculator
How many tiles do I need?
Enter the area you're tiling and the tile size. We add a waste allowance for cuts and breakage and work out the tiles and boxes.
- Boxes
- 6 boxes
- Area to tile
- 80.0 sq ft
An estimate to plan and budget with. Measure carefully and check the product’s own figures before you buy.
Results update as you type.
How it’s calculated
- 1
Area is length × width; each tile covers its width × height in inches ÷ 144 square feet.
- 2
We add 10% for cuts and breakage (15% for diagonal or herringbone) and divide by one tile's area, rounding up.
- 3
Tiles ÷ tiles per box, rounded up, is the boxes to buy.
Before you buy
Buy all your tile from the same lot (dye lot number on the box) so the color matches.
Large tiles need a very flat floor; uneven subfloors cause lippage and cracks.
Keep a few spare tiles for future repairs: discontinued tile is hard to match.
Questions
How much extra tile should I buy?
About 10% extra for a straight layout and 15% or more for diagonal or herringbone patterns, small rooms with many cuts, or fragile tile.
How many 12 × 24 tiles are in a square foot?
A 12 × 24 inch tile covers 2 sq ft, so half a tile per square foot. A 100 sq ft floor needs 50 tiles before waste, about 55 with 10% extra.