Flooring & Tile Calculator
Enter the room size, the extra for waste and the square feet in each box (printed on the box). Use 10% extra for straight layouts, 15% for diagonal or herringbone patterns, and more for large tiles in small rooms.
Keep a spare box: matching a dye lot years later is hard.
How it’s calculated
- Area = length × width.
- Boxes = area × (1 + waste %) ÷ sq ft per box, rounded up.
Questions
- How much extra flooring should I buy?
- 10% for most rooms, 15% for diagonal or patterned layouts.
- How many 12 × 24 tiles are in a square foot?
- Each 12 × 24 tile covers 2 sq ft, so half a tile per square foot.