BASES

* Sold single, unless stated otherwise 

* You can use them as is if you prefer vaping flavorless zero nicotine e-liquid.

PG: The acronym "PG" stands for Propylene Glycol. Propylene Glycol is a simple diol compound that is odorless and virtually tasteless, although some claim that it has a very faint sweet taste to it.
Shelf Life: At least two years when stored at ambient temperatures in closed containers and away from sunlight and other sources of UV light.

VG: The acronym "VG" stands for Vegetable Glycerin. Vegetable Glycerine is a simple polyol compound that is odorless and has a slightly sweet taste to it. VG is widely used in pharmaceutical applications as well as many food products.
Shelf Life: At least two years when stored at ambient temperatures in closed containers and away from sunlight and other sources of UV light.

PG vs VG: Vegetable Glycerine tends to be much thicker in texture than Propylene Glycol. Although this consistency tends to provide thicker vapor clouds, it is also known to clog atomizer coils much faster than PG, which is much less viscous than VG. As a result, the majority of e-liquids contain some balance of PG-to-VG, so that the liquid provides a thick vapor cloud without clogging the atomizer heads too rapidly. However, a very small section of electronic cigarette users have an allergy to PG, and are therefore forced to use 100% VG e-liquids.

E-liquids with higher levels of propylene glycol tend to provide a more substantial “throat hit,” which is a critical criterion for those who are turning to vaping as an alternative to cigarettes. Higher VG e-liquids, on the other hand, are smoother and tend to deliver a substantially less prominent throat hit. For this reason, higher PG e-liquids are recommended for those seeking an alternative to smoking, while VG-dominant e-juices are advised for hobbyists who value flavor and vapor production.

Link to DIY E-liquid Calculator

With this calculator you'll figure out the amount of PG, VG and Nic Shots required to achieve your preferred Nicotine Strength and PG/VG Ratio of Final E-Liquid Mix.

Okay, this works for DIY from scratch, but i have a longfill 30/120ml Bottle. Can i use the same calculator?

Yes you can! All you need is to calculate the flavor percentage of your longfill.
In your case do 30/120%
The result is 25%
Set 25 at the Flavoring percentage field and don't hit the VG mark, because almost all longfills contain PG based flavors.

Link to PG/VG Ratio Calculator

With this calculator you'll figure out the PG/VG Ratio of your DIY bottle (Full DIY, Longfill, or Shortfill) and the Nicotine Strength of Final E-Liquid Mix.