Quick answer: Divide your room's square footage by the coverage per box (on the carton, often 18โ24 sq ft) and add 10% for waste โ more for diagonal or herringbone layouts.
Calculate flooring boxes needed for hardwood, LVP, or laminate. Includes pattern layout waste and cost per sq ft.
The #1 reason floating floors fail (clicking noises, separated seams, and voided warranties) is improper underlayment. You cannot just throw planks on the subfloor.
Flooring materials expand and contract with temperature. If you buy cold planks from a warehouse and install them immediately in a warm house, they will expand after installation, buckle, and pop up in the middle of the room.
Floating floors are incredibly forgiving, except for one thing: they are not structural. They will telegraph every bump and dip in your subfloor.
The Industry Standard: Your subfloor must be flat within 3/16 of an inch over a 10-foot radius.
This is the most common design question. While floating floors can technically go any direction, there are two "best practice" rules:
Every room layout is a little different. Here is how to use our calculator for the most common flooring scenarios.
It depends on the product. Many modern LVP and laminate products come with a pre-attached pad. If yours has this, do not add an extra layer. If it is bare, you must buy underlayment separately.
Yes, you can install LVP or laminate directly over ceramic tile, provided the tile is firmly attached, the grout lines are not deeply recessed, and the floor is perfectly level. If the grout lines are deep, the pattern will "telegraph" through the new floor.
For straight cuts, use the score and snap method with a utility knife. Score the face deeply, snap it backward, and cut the backing. For L-cuts or notches around door jambs, use a jigsaw with a fine-tooth blade. Always cut face-up to prevent chipping.
You must leave a 1/4-inch gap around the entire perimeter of the room (walls, cabinets, pipes). This gap is covered by your baseboards or quarter-round trim. If you butt the floor tight against the wall, it has nowhere to go when it expands and will buckle.
Yes, LVP is waterproof, but the seams are not always 100% watertight. If water sits in the seams for days, it can grow mold underneath. If you install in a full bath, glue the planks down or use a "click-lock" system with a tight locking mechanism, and caulk the perimeter where it meets the toilet/tub.
Multiply the room's length by its width, both measured in feet, to get square footage. For an L-shaped or irregular room, split it into two or more rectangles, calculate each one separately, then add the totals together. Use our Square Footage Calculator if you need help with circular, triangular, or multi-section rooms specifically.
At 24 sq ft per box, the most common LVP and laminate carton size, with 10% waste for a standard rectangular room.
| Room | Area | Boxes @ 10% waste | Boxes @ 15% | Sq ft purchased |
|---|---|---|---|---|
| 10 x 10 ft | 100 sq ft | 5 | 5 | 120 sq ft |
| 10 x 12 ft | 120 sq ft | 6 | 6 | 144 sq ft |
| 12 x 12 ft | 144 sq ft | 7 | 7 | 168 sq ft |
| 12 x 14 ft | 168 sq ft | 8 | 9 | 192 sq ft |
| 12 x 16 ft | 192 sq ft | 9 | 10 | 216 sq ft |
| 14 x 18 ft | 252 sq ft | 12 | 13 | 288 sq ft |
| 15 x 20 ft | 300 sq ft | 14 | 15 | 336 sq ft |
| 20 x 24 ft | 480 sq ft | 22 | 23 | 528 sq ft |
| 24 x 30 ft | 720 sq ft | 33 | 35 | 792 sq ft |
Box coverage varies by product from about 18 to 30 sq ft โ check the carton before ordering. Always buy whole boxes and keep one spare for repairs.
Every constant this calculator uses and where it comes from, so you can check it rather than take our word for it.
Local codes amend the model IRC and adopt different cycles — your building department governs. Manufacturers revise yields; where your product's data sheet disagrees with a default here, use the product's number. See our full methodology.