Formula
- Use the units shown beside each field.
- Results update automatically whenever you change an input.
- Displayed values use up to four decimal places, or scientific notation for very small or large numbers. Calculations use standard floating-point arithmetic; exact integer and fraction tools identify their own precision rules.
- Flat coverage model with the same overlap at every joint. Does not alternate two offset layers or account for posts.
Example Calculation
- Panel width: 1800 mm
- Board face width: 100 mm
- Overlap per successive board: 20 mm
Panel width = 1800 mm; Board face width = 100 mm; Overlap per successive board = 20 mm. Primary result: 23.
Frequently asked questions
How do I use this calculator?
Enter panel width, board face width, overlap per successive board. The result updates automatically. Use Reset to restore the example values.
What method does it use?
count=max(1,ceil((panel width−overlap)/(board width−overlap))).. Flat coverage model with the same overlap at every joint. Does not alternate two offset layers or account for posts.
Why might a rounded result differ?
The calculation keeps full numeric precision internally, then rounds the displayed result. Rounding intermediate steps by hand can produce a slightly different answer.
Are my inputs saved online?
No. This calculator processes your inputs in your browser. A recently used list stores only calculator names on this device, not your entered values.
Check the assumptions and units before using this result. Read about calculation methods.