Deck Board Calculator

How many deck boards for your deck size.

Enter your deck size and board dimensions to estimate how many deck boards you need, including waste.

Deck length (ft)

Deck width (ft)

Board width (in)

Board length (ft)

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One board covers its width (in inches ÷ 12) × its length. Divide deck area by that, then add ~10% for gaps, cuts, and the occasional bad board.

What about fasteners?

Plan roughly 350 screws per 100 sq ft of decking (two per joist crossing), or a hidden-fastener clip per board foot.

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