Flooring quantity by room size
Use this table as a quick cross-check for laminate, vinyl plank or similar boxed flooring. Product coverage varies, so the exact box coverage should come from the package.
Published August 30, 2026 · Reviewed September 3, 2026 · Method: BetterHomeHabits calculator model
Quick answer
For rectangular rooms, calculate floor area, add an installation waste allowance, then divide by the coverage per box and round up. A 10% waste factor is a common planning input, not a universal rule.
Reference table
| Room size | Floor area | Target incl. 10% waste | Boxes at 23.5 sq ft |
|---|---|---|---|
| 8 × 10 ft | 80 sq ft | 88 sq ft | 4 |
| 10 × 10 ft | 100 sq ft | 110 sq ft | 5 |
| 10 × 12 ft | 120 sq ft | 132 sq ft | 6 |
| 12 × 12 ft | 144 sq ft | 158 sq ft | 7 |
| 12 × 15 ft | 180 sq ft | 198 sq ft | 9 |
| 15 × 20 ft | 300 sq ft | 330 sq ft | 15 |
Assumptions used
- 10% waste allowance
- 23.5 sq ft per box
- Simple rectangular layout
Why your result may differ
Plank direction, room shape, closets, transitions, pattern repeat and the exact coverage printed on each box can increase the rounded purchase quantity.
Methodology
Each row multiplies rectangular area by 1.10 and rounds the result to whole cartons using 23.5 sq ft of coverage per carton.