Deck Board Calculator
deck length
deck width
gap
What to measure
Deck length
ft
inch
yd
m
cm
Runs parallel to the boards.
Deck width
ft
inch
yd
m
cm
Board width
inch
ft
cm
mm
Actual width. A "5/4 × 6" board measures 5.5 in.
Gap between boards
inch
ft
cm
mm
3/16 in for kiln-dried, 1/8 in for wet-treated lumber that will shrink.
Board length sold
ft
Stock length you can buy, not the deck length: cutting to fit is where waste comes from.
Joist spacing
inch
ft
cm
mm
16 in on centre is standard; a diagonal layout needs 12.
Boards to order
26 boards
Show the work
Deck Board Calculator
by Rule Calculator