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Deck and Floor Board Calculator See also: Deck Stump, Bearer and Joist Calculator Centers, Spacings, Plans and Costs

Deck Width
Board Width
Board Thick
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Optimal Gap is the gap you'd prefer. Actual Gap is what fits with evenly spaced full width boards. For exact gap, see Bosrd Fit Options
Optimal Gap
Actual
Deck Length
+ % Waste
Joist Spacing
Cost / Linear ft $


Deck Area ft²

Board Fit Options Scale


Deck and floor board spacing diagram

Running Board Measurements. Click list to format vertically.

Mark-out

Out of Square If your deck is slightly out of square (different widths), calculate results for both widths, and set out each end to suit.

If necessary, adjust number of deck boards to match in both calculations, and see if different board gaps at each end of deck are acceptable, compared to equal gaps and cutting the last board at an angle.





DON'T BREATH THE DUST If you're cutting blocks, concrete, stone or ANYTHING and there's DUST - DON'T TAKE THE RISK
Don't cut it, or cut it wet so there's NO DUST - Silicosis Sucks
And if you're cutting wet, wear a mask - theres dust in the spray too!

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All calculators on this site are geometric only.
Check relevant local regulations for appropriate sizes, spacings and all engineering requirements.


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