Decking Calculator
Estimate deck area, decking boards and joist count from deck dimensions and common layout settings.
Results
Deck area
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Decking linear length
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Stock boards
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Joists / framing lines
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Use the result as a planning estimate and verify project-specific dimensions, product information and local requirements where relevant.
How it works
The calculator determines rows of decking across the deck width, applies a waste allowance to required linear footage, converts that to stock-board count, and estimates framing lines from joist spacing.
board rows ≈ deck width ÷ (board face + gap)Limitations
- This is a planning estimate, not a structural design or code-compliance calculation. Beam, post, footing, blocking and fastening requirements are not included.