Drag coefficient formula???

01

What is the formula for finding this out? Sorry, for being n00bish and for this not being posted in the relevant forum but this one has the most people viewing so I thought I'd get the quickest response this way. Thanks.

O yea, I've tried searching, but sifting through the pages of posts makes mine eyes hurt. plus, i didnt find too much either...anyways, help is appreciated.

russ_watters

HERE is a good description.