taken from Botboy141 ‘‘**Guide to Mixing By Weight**’’

The basic values that you need to know for mixing by weight are below.

Weight of PG: 1.038 grams per ml

Weight of VG: 1.26 grams per ml

Weight of Pure Nicotine: 1.01 grams per ml

Weight of 100mg in PG: 1.035 grams per ml

Weight of 60mg in PG: 1.03632 grams per ml

Weight of 50mg in PG: 1.0366 grams per ml

Weight of 48mg in PG: 1.036656 grams per ml

Weight of 36mg in PG: 1.036992 grams per ml

Weight of 24mg in PG: 1.037328 grams per ml

Weight of 100mg in VG: 1.235 grams per ml

Weight of 60mg in VG: 1.245 grams per ml

Weight of 50mg in VG: 1.2475 grams per ml

Weight of 48mg in VG: 1.248 grams per ml

Weight of 36mg in VG: 1.251 grams per ml

Weight of 24mg in VG: 1.254 grams per ml

If you have a mix of Nicotine that is not listed above the calculation is fairly simple:

48mg VG based nicotine solution. That’s 4.8% pure nicotine and 95.2%

pure VG. Pure nicotine weighs 1.01g/ml and Pure VG weights 1.26g/ml.

Let’s assume we have 100ml for simplicity with decimal points.

4.8 x 1.01 = 4.848 grams. 95.2 x 1.26 = 119.952 grams. If we add

these two together: 4.848 + 119.952 = 124.8 grams. Divide it by 100 and

we have our weight per ml for 48mg nic. 124.8 / 100 = 1.248 g/ml. This

same breakdown can be done for 50/50 blends, just know that the non pure

nicotine portion of your base is split 50/50, for example, 60ml in

50/50 mix = 6% pure nic, 94% left over = 47% VG, 47% PG.

When it comes to flavors, there are a couple of thoughts/theories

surrounding mixing by weight when dealing with flavors. Many people

enter the specific gravity as indicated on an MSDS for every flavor that

they have. I feel this is a complete waste of time. After searching

hundreds of MSDS sheets for flavors, all flavors fall into a range of

.93g per ml to 1.07g per ml.

In order to achieve personal consistency for your juices though, all

that is relevant is that you use the SAME value, every time for any

given flavor. I simply use a value of 1. This means that whether or not

my flavors actually weigh 1 gram per ml, I always pretend they do.

Percentages in any given recipe of mine will always be the exact same

for me, however, if I am trying to recreate someone elses recipe, or

they are mixing mine, there’s a chance I’ll be off a little bit (no more

than 7% which is about the margin of error most people get when mixing

by volume).