Depends on the type of wood. Okoume is about 30 lb/cf Meranti is 37 lb/cf.
US marine fir plywood is about 35 lb/cf. In general softwood plywoods
weigh about 5% more than the wood it is made from. Heavier hardwood plywood
is around 2% heavier.

--
Glenn Ashmore

I'm building a 45' cutter in strip/composite. Watch my progress (or lack
there of) at: http://www.rutuonline.com
Shameless Commercial Division: http://www.spade-anchor-us.com

"mscres" wrote in message
...
Anyone can give a quick answer to Plywood Density? Or just average weight
per square foot of .5 in Plywood.
It seems my calculation to by boat weight is wrong.

Thanks in advance