Tile Calculator
Enter the area in feet and the tile size in inches. Add 10% waste for straight layouts and 15% for diagonal or herringbone.
ft
ft
in
in
%
$
Result–
How much extra tile to buy
Add 10% for straight layouts and 15% or more for diagonal or herringbone patterns, small rooms with lots of cuts, or large tiles that break easily.
Buy all your tile from the same lot number so the color matches, and keep a few spares for future repairs. Remember grout, thinset and spacers; the box usually lists coverage per bag.
Tiles per 100 square feet
| Tile size | Tiles per 100 sq ft | With 10% waste |
|---|---|---|
| 4 × 4 in | 900 | 991 |
| 6 × 6 in | 400 | 441 |
| 12 × 12 in | 100 | 111 |
| 12 × 24 in | 50 | 56 |
| 18 × 18 in | 44 | 49 |
| 24 × 24 in | 25 | 28 |
| 3 × 6 in | 800 | 881 |
| 6 × 24 in | 100 | 111 |
| 8 × 48 in | 38 | 42 |
Tiles = area (sq ft) ÷ (tile width × tile length ÷ 144) × (1 + waste)
Questions
How much extra tile should I buy?
10% for a straight layout, 15% for diagonal, herringbone or a room with many cuts.
How many 12 × 24 tiles in a box?
Often 8 tiles (16 sq ft), but it varies by brand. Check the box label.