TradesHow this works
Enter the room area, the box coverage from the carton, and the layout pattern. The tool adds the pattern's waste, divides by the box coverage, and rounds up to whole boxes. It lays all three patterns side by side so you can see what a diagonal or herringbone actually costs in material before you commit to the look.
It also adds a box of attic stock when you want it, so a future repair matches the dye lot. The golden rule: buy the whole job, waste and spare included, from a single lot.
Common questions
How many boxes of flooring do I need?
Take the room area, add waste for the layout pattern, and divide by the box coverage printed on the carton, then round up. Most planks cover 18 to 24 square feet per box. This tool does the math for all three common patterns.
How much waste should I add for the pattern?
A straight lay wastes about 8 percent in cuts at the walls. A 45-degree diagonal wastes about 15 percent, and herringbone or chevron about 20 percent, because every piece is cut at an angle. The busier the pattern, the more you buy.
What is attic stock?
It is a spare box you keep after the job. Floors get damaged, and a plank from the original run matches the color and dye lot far better than something bought years later. Ordering one extra box up front is cheap insurance.
Why order from one dye lot?
Flooring is made in batches, and the color can shift slightly between them. If you run short and reorder, the new boxes can be a visible shade off. Order the whole job, waste and attic stock included, in a single lot.
Sources: Flooring waste by pattern: straight ~8%, diagonal ~15%, herringbone ~20% (installer planning ranges). Engine version 1.0.0. Risk tier 1.