Flooring Calculator
Enter room size and waste % to find square footage needed plus number of boxes.
Calculate how much flooring material to buy. Enter the room dimensions, choose a waste percentage (10% is standard for rectangular rooms; 15% for diagonal installs), and optionally enter the box coverage to get the exact number of boxes.
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Last reviewed: April 2026Report an error
Area to Order
132.0 sq ft
120.0 sq ft room + 10% waste = 132.0 sq ft to order (14.67 sq yd). That's 7 boxes at 20 sq ft/box.
Room Area
120.0 sq ft
With 10% Waste
132.0 sq ft
Square Yards
14.67 sq yd
Boxes Needed
7
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How to Use This Flooring Calculator
- Enter room length and width in feet.
- Enter a waste percentage (10% for straight install, 15% for diagonal).
- Optionally enter square feet per box to see boxes needed.
- Read total square footage with waste and order that amount.
Frequently Asked Questions
- Cutting pieces to fit edges and corners creates off-cuts that cannot be reused. 10% covers a standard rectangular room; add 5% more for diagonal or herringbone patterns.
- Divide the room into rectangles, calculate each separately, and add the areas.
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