Calculator Inputs
ft
ft
in
ft
%
$
Results
192.00 sq ft
Deck Area
38 boards
Boards Needed
10 joists
Joists (~16" OC)
~608 screws
Screws / Fasteners
$570.00
Total Board Cost
About This Calculator
Plan your deck with accurate material estimates. This calculator determines the number of deck boards, joists, and fasteners needed for your project.
Layout Tips
- Run boards perpendicular to joists for best support
- Stagger board joints for a more natural look
- Use hidden fasteners for a clean, screw-free surface
- Always add 10% for waste, cuts, and defective boards
Frequently Asked Questions
How many deck boards do I need for a 12x16 deck?
For a 12×16 deck with 5.5" boards and 0.25" gaps, you need approximately 37 boards. This accounts for 10% waste.
What's the best gap between deck boards?
A 1/4 inch (0.25") gap is standard for most wood decking. Composite decking may require slightly wider gaps — check manufacturer specs.