Below you will find some common weight factors that will help you to figure how much your material weighs.
DIMENSION AND TIMBERS
KDHF or KDSPF or KDPP or KDESLP use 1800#/m
or take your board footage times 1.8
KDDF is usally a little heavier use 2000#/m
or take your board footage times 2.0
GDF use 2400#/m or take your board footage times 2.4
PLYWOOD AND OSB DEPEND ON THE THICKENESS
11/32 is 1100#/m or take your square footage times 1.1
15/32 is 1500#/m or take your square footage times 1.5
19/32 or 5/8 is 1800#/m or take your square footage times 1.8
23/32 or 3/4 is 2200#/m or take your square footage times 2.2
1-1/8 is 3300#/m or take your square footage times 3.3
These are all approximates but it should get you pretty close. If you should need any additional information please feel free to call and we will see if we can get your answer.