How to use it
- Enter the area dimensions.
- Choose sheet size and waste.
The formula
Sheets = area ÷ sheet area × (1 + waste)
Worked example
| Area length | 24 ft |
| Area width | 16 ft |
| Sheet size | 4 × 8 ft (32 ft²) |
| Waste | 10 % |
Result
| Sheets needed | 14 |
| Area | 384 ft² |
| Sheets without waste | 12 |
Tips before you order
- Stagger sheet end joints and leave a ⅛ in gap for expansion.
- Roof sheathing needs H-clips between rafters on some spans.
Questions
How many sheets of plywood for a 24×16 floor?
384 ft² ÷ 32 = 12 sheets, or 14 with 10% waste.