This is an experiment I did...I'd say coming up for nearly 2 years ago. Interested in the economics of rolling ones own cigarettes (tobacco is bad mmmkay?) I weighed a 'tailor made' cigarette as a whole (paper + filter) and then just the tobacco contained within.
Below are the pictures...as you can see the cigarette weighed 0.8g and the tobacco 0.7g - Now this is for a popular product on Australian shelves, it is the 'king size' cigarette. Assuming the cigarettes are consistent (quality control) there should be 14g of tobacco in a packet of 20 cigarettes just under half the amount contained in the smaller 30g tobacco pouches on the market. Prices vary so I can't really give a definitive answer to the cost but you have to factor in rolling papers and filters as well (unless you smoke from a pipe/unfiltered rolled cigarettes.
Of course it all comes down to preference - Smoking peers have told me they don't smoke as many if they roll their own as it's a hassle...whilst I personally think the tobacco that came out of pre-made cigarettes looked of a much lesser quality (oh look a legal threat from giant tobacco :P) than that in pouches.
Anyhow...Just something I found in my photo album and thought I'd share. Enjoy.