I don't use the e-juice calculators anymore if the recipe is simple.
First thing is, how much nicotine ?
I might start with 100mg VG that's been diluted with 20% distilled water, resulting in an 80mg nicotine base liquid. If I want to make a 24mg recipe, I divide 24 (mg for recipe) by 80 (mg for base) which gives 0.3. Convert it to percent by moving the decimal point two places to the right, making it 30%. The recipe for 24mg juice will have 30% of 80mg unflavored nicotine base.
Second thing: how much unflavored nicotine to add?
I make quite a few 6ml batches for friends. For 24mg I would multiply 6ml by 0.3 (30%) to get the quantity of unflavored nic base: 1.8ml. The recipe will need 1.8ml of nicotine base.
Next thing: how much flavoring to add?
Same calculation as above: if I decide on 20% flavoring, then I multiply the 6ml batch size by 0.2 which = 1.2ml. I need to add 1.2ml of flavoring for this 6ml batch.
Last thing: how much zero nic base?
Well, we already have 1.8ml + 1.2ml; add those together and you get 3.0ml.
Total recipe is 6.0ml, so subtract the 3.0ml of nic+flavoring from the 6.0ml of recipe quantity and that leaves 3.0ml, the quantity for zero nic.
To sum it up, the recipe has:
1.8ml 80mg nicotine base (30%)
1.2ml flavoring (20%)
3.0ml zero nic base (plain PG or VG) (50%)
6.0ml total
And how much of that was VG, and how much was PG?
I used 1.8ml of VG nic base which was 20% water + 80% VG.
1.8ml X 0.8 = 1.44ml VG
If I had used PG zero nic base, then 1.44ml divided by 6ml = 0.24 or 24% VG in the recipe.
If I had used VG zero nic base: 3.0ml + 1.44ml = 4.44ml total VG. 4.44ml divided by 6ml = 0.74 or 74% VG in the recipe.
Hope this was helpful to someone.
