Flooring and tile calculator
Enter the room's size and the coverage printed on one box. Use 10% extra for a straight layout and 15% for diagonal or herringbone.
Your estimateEstimate
- Floor area
- 120 ft²
- With extra for cuts
- 132 ft²
Boxes to buy7
How it is calculated
Floor area = length × width. Material needed = area × (1 + extra %). Boxes = material needed ÷ coverage per box, rounded up.
Worked example
With the starting values shown in the form, the result is 7 (boxes to buy). Change any number and the estimate updates as you type.
Tips
- Buy all boxes from the same batch or dye lot so the color matches.
- Keep one spare box for future repairs.
Questions
- How much extra flooring should I buy?
- About 10% for straight layouts in simple rooms, and 15% or more for diagonal or herringbone patterns and rooms with many corners.
- How many boxes for a 12 × 10 room?
- 120 ft² plus 10% is 132 ft². With 20 ft² boxes, that is 7 boxes.
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