Decking Calculators
A deck is a system — boards for the surface, joists and beams for the structure, posts and footings for the ground. These calculators size the board count for your deck dimensions and build a full material list including fasteners and joists. They are planning tools, not engineering: always verify structural spans, footing depths, and railings against your local building code.
Deck Board CalculatorFigure out exactly how many deck boards, joists, and screws your deck needs.DeckingDeck Material CalculatorFull deck material takeoff: boards, joists, beams, posts, footings, and concrete.Decking
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Decking FAQs
Divide the deck width by the board width plus your gap — a 16-foot-wide deck needs roughly 32 six-inch boards at standard spacing, as a rule of thumb. The calculator does the exact division for your dimensions, board width, and gap choice.
In most jurisdictions, yes for decks attached to the house or above a low height threshold. These calculators are planning tools only — check local code for joist spans, footing depths, and railing requirements before you build.
Estimates are planning guides, not professional advice. Read the disclaimer.