I am cutting some pine out of my wood lot to build a pig pen and a couple other projects. I have walked around using a Tree stick scale to estimate the total number of board feet in the trees so I know how many to cut. The tree stick is calculating the number of 16 foot logs per tree and gives some estimates as to the total bd/ ft per tree. I have my list of lumber needed and the lengths needed but, how can I tell how many bd ft of lumber is in a certain log say at eight feet long or at twelve feet long so I can know when I have enough 12 footers and enough 8 footers cut? I am not a logger or a forester but, I have cut locusts for poles and pulpwood etc,but this is the first time I have needed to calculate just what is needed for each length. Is there a standard to use. Thanks.