@the dog - if you did not mean for DIY, and you are looking for a guide for nic content in PRE-MADE (vendor bought) liquids, as a new vaper you might wish to consider how much you smoked as a guide.
There are no hard and fast rules, but there is a sort of scale you can use.
"Juice, or e-liquid:
For e-liquid, the typical nicotine recommendations are generally determined by how much you smoked, and are as follows:
1/2 pack per day or less = 6 mg nicotine
1 ppd = 12 mg
1 1/2 ppd = 18 mg
2 ppd = 24 mg
Figure on consuming at least 3 - 5 ml of liquid daily. Bottles are usually 10 or 30 ml volume.
E-liquid generally has concentrated liquid nicotine, propylene glycol (Pg), vegetable glycerin (Vg) and flavoring extracts.
PG and VG are usually used together in different ratios in e-liquid. For example, a 50/50 PG/VG ratio is common. Some juice vendors offer a range of different ratios depending upon customer preference.
PG = Propylene Glycol - the "flavor carrier" of e-liquid. A secondary source of "throat hit", but not as strong as the nicotine concentration. Some people have a sensitivity or even an allergy to PG. It's very thin in consistancy.
VG = Vegetable Glycerin - the "vapor maker" of e-liquid. Used as a sweeter in many food sources, and also as a skin emollient. It's very thick in consistancy.
Sweeter (sugary) or darker flavors tend to clog coils and wicks faster. E-liquids heavy with Vg are thicker in viscosity and may not wick as well as thinner e-liquids in some tanks."
From Baditute's blog:
(4) Good Starter Setups for a Beginning Vapor | E-Cigarette Forum
Please let us know if you have any other questions. Everyone here will be more than helpful!