Flooring Calculator
Calculate how much flooring you need in square feet, including a waste percentage for cuts and pattern matching.
ft
ft
%
Net Area
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Area to Order —
Boxes Needed —
How to Use This Calculator
- Enter the room length and width in feet.
- Enter a waste percentage (10% is standard).
- Optionally enter sq ft per box to see number of boxes needed.
Formula
Net area = Length × Width
Order area = Net area × (1 + waste ÷ 100)
Boxes = ceil(Order area ÷ sq ft per box)
Example
Example: 15 × 20 ft room, 10% waste → 300 sq ft → order 330 sq ft. At 20 sq ft/box = 17 boxes.
Frequently Asked Questions
- Order the room area plus 5–10% for waste. Diagonal installations need 15%, and complex patterns may need up to 20% extra.
- For straight-lay hardwood or laminate, 8–10% is standard. For herringbone or diagonal patterns, use 15%.
- Yes — measure to the center of the doorway threshold and include that space in the room dimensions.
- Enter the coverage per box (printed on the box label) in the advanced fields and the calculator will show the number of boxes to buy.
- Yes — include all areas that will be floored, including closets, as one combined measurement.