How this calculator works
Estimate a theoretical minimum and a practical whole-stock order from deck dimensions, board direction, width, gap, stock length and waste.
Formula
Rows are calculated across the selected board direction. The result shows a theoretical minimum with ideal offcut reuse and a practical order based on whole stock pieces per row.
Rows are calculated across the selected board direction. The result shows a theoretical minimum with ideal offcut reuse and a practical order based on whole stock pieces per row.
Example
A 16 × 12 ft deck with 5.5 in boards typically needs two dozen or more full-length boards depending on orientation.
Reliability check
Choose board direction, then mark every row, butt joint and supporting joist. Use the practical upper count when ideal offcut reuse cannot be proved on a row-by-row cut plan.
How to get a better estimate
- Board orientation changes the required stock lengths.
- Staggered joints can increase offcuts.
- Structural framing is not included in this board-surface estimate.
What the result means
The result covers surface deck boards only. It excludes joists, beams, posts, stairs, fascia, picture framing, blocking, fasteners and structural design.