Thanks Chief for the reply. Still kinda confusing, and as you admitted, a little difficult to compare given the vast variables. Do you think you have an estimate of say, supposing we are the typical 3-5ml a day user, is that like smoking a pack a day? Or like 3-5 cigarettes a day? If I was better at math I could probably figure this out from your 1st reply, but....the fill line on my chamber reads 1.6ml, I usually smoke half of that 1.6ml a day, sometimes more, but I never have to refill it until the next day or day after, however, when I smoked cigarettes (3 days ago I went to only vapes) I always smoke at least a pack, usually a pack and a half. I just wondered how much I have cut back on nicotine only vaping half of 1.6ml of e juice?