Standard composite (Treks, TimberTech) and cedar deck boards are 5.5 inches wide. Joists are typically spaced 16 inches on center (or 12 inches for diagonal decking).
Decking Calculator
Calculate deck boards, total linear feet, joists count, and hidden fastener deck screws.
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📊 Calculation Results
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Total Deck Boards Needed
📐 Mathematical Formula & Standard
Deck Sq Ft = Length ft × Width ft
Linear Feet = (Deck Sq Ft × 1.10) ÷ (Board Width in ÷ 12)
Total Boards = Ceiling(Linear Feet ÷ Stock Board Length)
Linear Feet = (Deck Sq Ft × 1.10) ÷ (Board Width in ÷ 12)
Total Boards = Ceiling(Linear Feet ÷ Stock Board Length)
📖 Comprehensive Guide & Pro Estimating Tips
❓ Frequently Asked Questions
What joist spacing is needed for composite decking? ▼
Composite decking requires maximum 16-inch on-center joist spacing for straight boards and 12-inch on-center for 45-degree diagonal layout.
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