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Decking tools

Decking calculators

Plan deck surface boards, stock lengths, joist layout, waste, and material cost. These tools estimate quantities and do not replace a structural deck design.

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Decking calculators

Open a calculator to see its formula, assumptions, worked example, and related planning tools.

Deck Material CalculatorEstimate deck boards, total board length, joists, waste, and material cost.ReadyJoist CalculatorEstimate joist quantity and spacing for a deck frame.ReadyBoard CalculatorEstimate linear boards for a measured surface.Ready
Planning guidance

Before you calculate

  • Use actual board dimensions rather than nominal lumber labels.
  • Confirm spans, connections, footings, guards, and loads against current local requirements.
  • Allow more waste for diagonal patterns, picture frames, and complicated cuts.
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Continue your estimate

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