Deck Board Calculator

How this calculator works

Boards across the deck use their face width plus gap; this simple estimate assumes 8-foot boards running along the length.

Change one assumption at a time to see which inputs have the greatest effect on the estimate.

Worked example

A 16 ft by 12 ft deck with 5.5 in boards and 0.125 in gaps needs 52 eight-foot boards.

Limitations

Board lengths, cuts, framing, end gaps, waste, and fastening patterns affect a real material list.

Review this educational estimate against current quotes, official information, and your own budget before making a financial decision.