However, a straight comparison with regular tobacco cigs doesn't quite work.
Let's assume a tobacco cigarette has a stated nicotine content of 1mg. Smoke a pack a day and you are absorbing 20mg nicotine - actually less as not all the nic is absorbed.
Now, nicotine absorption from
vaping is far less. So if you vaped 1ml of juice per day with a nic content of 20mg/ml it should, in theory, equal the nic content of the tobacco cigs, right?
In practice, it's far less. How much less? No one is sure what the percentage of nicotine in vaping is actually absorbed by the body. Some say only about 20%, hence, by that number, you may have to vape up to 5ml of 20mg juice...it's a very gray area and YMMV.