This is from the back of an American Spirit rolling tobacco bag.
Thin 5.2mm diameter = 0.7-1.0mg nicotine
Thick 7.2mm diameter = 1.3-1.6mg nicotine
Quite shocking how much unfiltered nicotine I'd been pumping into myself, not to mention all the other crap. And wannabe quitters say rollies are easier to quit from, I call tosh on that.
They certainly are not a low nicotine or tar option. One common argument is that they contain less additives than pre-made cigarettes. I probably agree with this. Its been posted on here how companies developed additives just to increase the effect of nicotine (so a 1mg nicotine cig could have much more of a hit than its rating suggests).
This may help.
advisorybodies.doh.gov.uk/scoth/pdfs/fcsa_report_final.pdf
Can't post links yet, hope this works...
From the test posted above, the mean results per "Fine Cut Smoking Article" (per roll up) were:
Amber Leaf - Nicotine 1.19mg - Tar 12.7mg
Cutters Choice - Nicotine 1.02mg - Tar 13.8mg
Drum - Nicotine 0.79mg - Tar 11.7mg
Golden Virginia - Nicotine 1.27mg - Tar 14.3mg
Old Holborn - Nicotine 1.00mg - Tar 13.1mg
All tests were done on the "thin" specification, as they say this is more representative of the typical UK smoker.
One of these "thin" rollies is standardised at 400mg tobacco (0.4g). Therefore a 12.5g packet (referred to as a "half ounce" but actually short of this measure) at this spec would make 31 rollies. Obviously with these there is huge variation in the construction.