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Deck Materials Calculator

Plan your deck project with accurate estimates for decking boards, joists, posts, and fasteners.

Deck Dimensions

Deck Length*

m

Deck Width*

m

Board Width

cm

Common: 5.5 inches (nominal 6 inch)

Joist Spacing

cm

16 inches on-center is standard

Pro Tips from the Workshop

•Pressure-treated lumber for structure, cedar or composite for surface
•Check local codes for required post depth (usually 36-42 inches)
•Use 2 screws per board at each joist for secure attachment
•Plan for post anchors, joist hangers, and flashing

Ready to Calculate

Plan your deck project with accurate estimates for decking boards, joists, posts, and fasteners.

Deck Material Calculation

Deck building requires calculating multiple components:

Surface boards: deck area ÷ board width
Joists: deck length ÷ joist spacing, add rim joists
Posts: one every 6-8 feet around perimeter
Fasteners: ~1 lb screws per 100 sq ft of decking

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