How Many Boxes of Flooring Do I Need?
Quick answer: room area (plus waste) ÷ coverage per box. A 180 sq ft room with laminate at 20 sq ft per box and 10% waste needs 10 boxes — 198 ÷ 20 = 9.9, round up. Coverage per box is printed on the label — always check it.
- Read the box label first
- Room area math
- Waste by layout
- Box counts by room size
- L-shaped and odd rooms
- Worked example: 12×15 room
- FAQ
Read the box label first
Laminate and vinyl plank boxes cover 15–25 sq ft (20 sq ft is the most common); tile boxes run 10–20 sq ft. The number on the label is your divisor — coverage varies by brand and plank size, and guessing wrong by a few sq ft flips the box count.
Room area math
Multiply length × width for the room area. A 12×15 room is 180 sq ft. For closets included in the flooring, add them; for L-shaped rooms, split into rectangles and add the pieces.
Waste by layout
Use 10% for straight layouts in simple rooms, 15% for rooms with angles, doorways and closets, and up to 20% for diagonal or herringbone patterns. You cut at walls, doorways and around fixtures — waste is not optional.
| Room size | Area | +10% waste | Boxes @ 20 sq ft |
|---|---|---|---|
| 10×12 | 120 sq ft | 132 sq ft | 7 |
| 12×15 | 180 sq ft | 198 sq ft | 10 |
| 15×20 | 300 sq ft | 330 sq ft | 17 |
| 20×25 | 500 sq ft | 550 sq ft | 28 |
L-shaped and odd rooms
For an L-shaped room, split it into rectangles, calculate each, and add them — two 10×12 sections = 120 + 120 = 240 sq ft. Then add waste and divide by box coverage. The same approach works for rooms with bump-outs and bay areas.
Worked example: a 12×15 room
- Room area = 12 × 15 = 180 sq ft
- + 10% waste = 198 sq ft
- Box coverage = 20 sq ft (check label)
- 198 ÷ 20 = 9.9 → 10 boxes
FAQ
Divide the room area (plus waste) by the coverage per box. A 180 sq ft room with laminate at 20 sq ft per box and 10% waste needs 10 boxes — 198 ÷ 20 = 9.9, round up. Check the box label.
Usually 15–25 sq ft per box, with 20 sq ft the most common for laminate. Vinyl plank boxes are similar. Check the label — coverage varies by brand.
The room is 180 sq ft. With 10% waste that's 198 sq ft — about 10 boxes of laminate at 20 sq ft per box. Add more waste for diagonal layouts.
Use 10% for straight layouts in simple rooms, 15% for rooms with angles and closets, up to 20% for diagonal or herringbone patterns.
Split the room into rectangles, calculate each area, and add them. For two 10×12 sections, that's 120 + 120 = 240 sq ft, then add waste and divide by box coverage.