Deck Calculator
Calculate decking boards, joists with span validation, and material costs for your deck project.
⚠️ Structural Engineering Required
This calculator provides material estimates only. Deck construction requires proper engineering, building permits, and compliance with local codes. Always consult with a licensed professional.
Deck Dimensions
Actual width (5.5" for 2x6)
Typical: 1/8" (0.125")
Decking Materials
Boards Needed
52
Linear Feet
624
Deck Screws
1248
Joist Span Guidelines
Span Tables
Joist span limits vary by lumber species, grade, and spacing. These estimates use typical Southern Pine #2 grade.
Spacing Considerations
16" on-center is standard. 12" provides extra strength, 24" spacing requires larger joists.
Deck Board Direction
Boards perpendicular to house are typical. Parallel orientation may require blocking between joists.