e-Juice Question-How to change pg/vg mix

Status
Not open for further replies.

bwh79

Vaping Master
ECF Veteran
Verified Member
Dec 11, 2014
4,600
6,643
46
Oregon
It's simple math, folks. Didn't we all learn this stuff by freshman year? I bet you were one of the ones who went "I don't need to learn/remember this stuff, I'm never gonna use it in real life!" Well guess what...now it's "real life," and I bet you wish you'd learned/remembered it now, don't ya? :)

Since the one liquid is 50/50, you'll be adding the same quantity of PG as you add VG. You want to add "x" amount of each ("2x" amount of liquid, total) so that the resulting mix is 60/40.

(65+x) / (35+x) = 60/40 = 1.5

(65+x) / (35+x) = 1.5
65 + x = 1.5(35 + x)
65 + x = 52.5 + 1.5x
12.5 + x = 1.5x
12.5 = .5x
25 = x

You want to add X = 25% each of PG and VG, or 50% total of your 50/50 liquid. Let's check, with an easy example of 100ml liquid so that 1ml = 1%:

65ml PG/35ml VG
Add 50ml 50/50, so 25ml PG/25ml VG
Total 90ml PG/60ml VG
90/60 = 60/40 = 1.5
Check!

Also:
90 + 60 = 150
90 / 150 = .6 (60% PG)
60 / 150 = .4 (40% VG)
Check, again!

---------------------------------

Edit: to clarify, you start with 100ml (or 100%) of the 65/35, then take 50% of that amount and add that much (50ml in the example) of the 50/50 liquid. Or in other words, 2 parts 65/35 to one part 50/50, for any size "part."
 
Last edited:
  • Like
Reactions: Dani47

Dani47

Full Member
Nov 15, 2013
29
5
USA
Hi, Dani. The easiest thing to do would be to get the same flavor in 100% VG if possible. That way you could add 5% to your 65/35 mix. It would reduce your PG by 5% making it 60% PG and increase your VG by 5% making it 40% VG = 60/40 PG/VG

Hope that helps and good luck to you.
Thank you ... will see if 100% is available!
 

Dani47

Full Member
Nov 15, 2013
29
5
USA
Yes, you can mix premade juices to change the ratio. Or you can add VG to boost it, but this will dilute flavor and nic.
Thank you. I didn't realize it would alter flavor and nic. Brings up another question. If I would mix 12mg nic with 3mg nic of same flavor trying to achieve 7.5mg nic - would it be a true 7.5mg, or am I missing something?
 

Dani47

Full Member
Nov 15, 2013
29
5
USA
It's simple math, folks. Didn't we all learn this stuff by freshman year? I bet you were one of the ones who went "I don't need to learn/remember this stuff, I'm never gonna use it in real life!" Well guess what...now it's "real life," and I bet you wish you'd learned/remembered it now, don't ya? :)

Since the one liquid is 50/50, you'll be adding the same quantity of PG as you add VG. You want to add "x" amount of each ("2x" amount of liquid, total) so that the resulting mix is 60/40.

(65+x) / (35+x) = 60/40 = 1.5

(65+x) / (35+x) = 1.5
65 + x = 1.5(35 + x)
65 + x = 52.5 + 1.5x
12.5 + x = 1.5x
12.5 = .5x
25 = x

You want to add X = 25% each of PG and VG, or 50% total of your 50/50 liquid. Let's check, with an easy example of 100ml liquid so that 1ml = 1%:

65ml PG/35ml VG
Add 50ml 50/50, so 25ml PG/25ml VG
Total 90ml PG/60ml VG
90/60 = 60/40 = 1.5
Check!

Also:
90 + 60 = 150
90 / 150 = .6 (60% PG)
60 / 150 = .4 (40% VG)
Check, again!

---------------------------------

Edit: to clarify, you start with 100ml (or 100%) of the 65/35, then take 50% of that amount and add that much (50ml in the example) of the 50/50 liquid. Or in other words, 2 parts 65/35 to one part 50/50, for any size "part."

It's simple math, folks. Didn't we all learn this stuff by freshman year? I bet you were one of the ones who went "I don't need to learn/remember this stuff, I'm never gonna use it in real life!" Well guess what...now it's "real life," and I bet you wish you'd learned/remembered it now, don't ya? :)

Since the one liquid is 50/50, you'll be adding the same quantity of PG as you add VG. You want to add "x" amount of each ("2x" amount of liquid, total) so that the resulting mix is 60/40.

(65+x) / (35+x) = 60/40 = 1.5

(65+x) / (35+x) = 1.5
65 + x = 1.5(35 + x)
65 + x = 52.5 + 1.5x
12.5 + x = 1.5x
12.5 = .5x
25 = x

You want to add X = 25% each of PG and VG, or 50% total of your 50/50 liquid. Let's check, with an easy example of 100ml liquid so that 1ml = 1%:

65ml PG/35ml VG
Add 50ml 50/50, so 25ml PG/25ml VG
Total 90ml PG/60ml VG
90/60 = 60/40 = 1.5
Check!

Also:
90 + 60 = 150
90 / 150 = .6 (60% PG)
60 / 150 = .4 (40% VG)
Check, again!

---------------------------------

Edit: to clarify, you start with 100ml (or 100%) of the 65/35, then take 50% of that amount and add that much (50ml in the example) of the 50/50 liquid. Or in other words, 2 parts 65/35 to one part 50/50, for any size "part."
Thanks so much! I appreciate your thorough explanation, and no ... math is not my thing! LOL Your last sentence answered my question perfectly - thanks! :)
 

suprtrkr

ECF Guru
ECF Veteran
Verified Member
Jun 22, 2014
10,410
15,048
Cowtown, USA. Where the West begins.
Thank you. I didn't realize it would alter flavor and nic. Brings up another question. If I would mix 12mg nic with 3mg nic of same flavor trying to achieve 7.5mg nic - would it be a true 7.5mg, or am I missing something?
That would be correct so long as you mixed equal volumes of each. A full bottle of 18 plus a full bottle of 0 equals 2 bottles of 9. A bottle of 12 and a bottle of 6 gives the same result. Two bottles of 12 plus a bottle of 3 gives 3 bottles of 9, and so forth. A 10ml syringe for measuring will let you do fractional bottles...
 

Dani47

Full Member
Nov 15, 2013
29
5
USA
That would be correct so long as you mixed equal volumes of each. A full bottle of 18 plus a full bottle of 0 equals 2 bottles of 9. A bottle of 12 and a bottle of 6 gives the same result. Two bottles of 12 plus a bottle of 3 gives 3 bottles of 9, and so forth. A 10ml syringe for measuring will let you do fractional bottles...
Thank you! Somewhere I read mixing different Nic mg's, even if the same flavor, that it would not be a "true" final mg that we're looking for. They said it had something to do with the way the nic is mixed with the PG or something. I did NOT understand that thought process, but I'm not a "mixologist", so what do I know? lol Thanks!
 
  • Like
Reactions: suprtrkr

bwh79

Vaping Master
ECF Veteran
Verified Member
Dec 11, 2014
4,600
6,643
46
Oregon
Thank you! Somewhere I read mixing different Nic mg's, even if the same flavor, that it would not be a "true" final mg that we're looking for. They said it had something to do with the way the nic is mixed with the PG or something. I did NOT understand that thought process, but I'm not a "mixologist", so what do I know? lol Thanks!
They may have just been saying it's not additive. For example if you take a bottle of 6mg and add it to a bottle of 3mg, you do not simply end up with 6+3=9mg. You have to account that each one is only half of the final mix. So you would do .5(6) + .5(3) = 3 + 1.5 = 4.5mg/ml for the final strength.
 

Dani47

Full Member
Nov 15, 2013
29
5
USA
They may have just been saying it's not additive. For example if you take a bottle of 6mg and add it to a bottle of 3mg, you do not simply end up with 6+3=9mg. You have to account that each one is only half of the final mix. So you would do .5(6) + .5(3) = 3 + 1.5 = 4.5mg/ml for the final strength.
Thanks. Wish I had notes of what I read, it had something strictly to do with how nic is used in the PG alone, was kinda strange & didn't make sense. I do understand what you're saying, tho, & appreciate your help!
 
Status
Not open for further replies.

Users who are viewing this thread