About Deck Calculator
Calculate the decking boards, joists, and fasteners required to build a wood or composite deck.. Designed for accurate, instantaneous calculations with zero wait time.
Formula
Deck Boards = Deck Width / Board Width (5.5" for 2x6) × Length
Example Calculation
A 16ft × 12ft deck using 5.5" boards requires ~35 sixteen-foot boards.
How to Use
- Enter your values into the form fields above.
- The calculation updates immediately in real time.
- Inspect the main summary and secondary breakdowns below.