Flooring calculator: how many boxes of flooring do I need?
Enter the room size and the coverage printed on the carton. The calculator adds your waste allowance, rounds up to whole boxes, and works out underlayment rolls and baseboard for you.
Price this job as an estimate in Quotesprig (free)
Common sizes, worked out
Laminate or vinyl plank, 10% waste, 20 sq ft per box, underlayment and baseboard. Every number below comes from the same calculator code as the tool above.
| Job | Floor area | Flooring | Underlayment | Baseboard |
|---|---|---|---|---|
| 10 × 10 ft room | 100 sq ft | 6 boxes | 2 rolls | 41 lin ft |
| 12 × 12 ft room | 144 sq ft | 8 boxes | 2 rolls | 50 lin ft |
| 15 × 12 ft room | 180 sq ft | 10 boxes | 2 rolls | 57 lin ft |
| 20 × 15 ft room | 300 sq ft | 17 boxes | 4 rolls | 74 lin ft |
| 24 × 20 ft room | 480 sq ft | 27 boxes | 6 rolls | 94 lin ft |
Assumptions you can change
Starting values: waste allowance 10 %, coverage per box (from the carton) 20 sq ft, underlayment per roll 100 sq ft, doorway width 3 ft, your production rate 25 sq ft/hr. They are typical starting points, not rules: use the numbers on your product labels and your own production rate.
FAQ
How many boxes of flooring for a 12x12 room?
For a 12 × 12 ft room (laminate or vinyl plank, 10% waste, 20 sq ft per box, underlayment and baseboard): floor area 144 sq ft; area to buy 158.4 sq ft; flooring 8 boxes; underlayment 2 rolls; baseboard 50 lin ft. Change any input above for your own job.
How much waste should I add for flooring?
The calculator starts at 10%, a common allowance for straight lay. Diagonal or herringbone layouts and rooms with many corners usually need more; change the waste allowance to match.
Where do I find the coverage per box?
It is printed on the carton (for example 20 sq ft per box). Type it in the assumptions; the box count updates as you type.
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