Hello and ask for Your help in maths

[hamsterjack]

Hi All

Sorry for my English.

First of all, let me introduce myself: I'm 53 years old, 37 years of 'analog' smoking (20 cigarettes / 24 hours) and I've been e-smoking for 3 months (I love it). My nic level is between 9 and 12 mg/ml. I'm from Poland and - of course - I'm new to this greate Forum.

I'm going to produce some e-liquid for myself using ready to use e-liquid called in Poland VPG (50% of PG and 50% of VG) contaning 12 mg of nic. This proportion is ok but I would like to change it to 60% (or 70%) of PG and 40% (or 30%) of VG. Of course there is no problem. I can buy a bottle of PG and a bottle of VG, take a 7 ml of PG add 3 ml of VG and I have 10 ml e-liquid in 70:30 proportion.

I found a lot of math formulas for calculatin nic, e-liquid, etc. But I need a math formula or an explenation how to count this (I'm NOT good at math):

1. I have 10 ml of 50:50 e-liquid (VPG 12 mg nic).
2. I have some PG (12 mg nic)
3. How many of PG should I add to 10 ml of VPG to have proportion 70% of PG and 30% of VG?

Thank You very much in advance

Best Regards

HamsterJack

 

[Ray D]

I hope I can state this without confusing you in your ability to understand English (your English seems fine to me).

First, figure out which part of the equation will remain the same. In this case, it will be the amount of VG. If you have 10 mls at 50/50, then you have 5 mls of VG.

You want to bump the ratio up to 70/30, or 70% PG / 30% VG.

From there, it's easy to figure out your total volume after the fact. 5 ml PG divided by your desired percentage:

5 / .3 = 16.7 total volume (actually 16.666..., but I'm rounding up)

So the total volume after addition you'll want is: 16.7

Take away the 5 mls of VG to determine total PG: 16.7-5 = 11.7

But with your original 10 mls, 5 is already PG, so subtract another 5 and you would need to add 6.7 mls of pure PG.

Or to put it more simply:

5 / .3 = 16.7

16.7 - 10 (original volume) = 6.7

And to check if this formula is now correct:

(5 mls (VG) / 16.7 (total volume)) x 100 = 29.94 % But we rounded up, so we weren't going to hit 30 exactly.

 

[steved5600]

I believe it will be 6.7 ml. of PG. a 70:30 mix would be 11.7ml to 5 ml. 11.7-5 is 6.7.

total would be 16.7. 11.7/16.7= 70% 5/16.7= 30% rounded off.

 

[Ray D]

I believe it will be 6.7 ml. of PG. a 70:30 mix would be 11.7ml to 5 ml. 11.7-5 is 6.7.

LOL. Gah! How did I manage to do that? (Had it correct on my paper and somehow typed it in wrong. /facepalm)

*Always check your posts for errors before hitting submit. That's what I get for typing out by memory and not referring to my work. Ugh.

 

[steved5600]

I hope I can state this without confusing you in your ability to understand English (your English seems fine to me).

First, figure out which part of the equation will remain the same. In this case, it will be the amount of VG. If you have 10 mls at 50/50, then you have 5 mls of VG.

You want to bump the ratio up to 70/30, or 70% PG / 30% VG.

From there, it's easy to figure out your total volume after the fact. 5 ml PG divided by your desired percentage:

5 / .3 = 16.7 total volume (actually 16.666..., but I'm rounding up)

So the total volume after addition you'll want is: 16.7

Take away the 5 mls of VG to determine total PG: 16.7-5 = 11.7

But with your original 10 mls, 5 is already PG, so subtract another 5 and you would need to add 5.7 mls of pure PG.

Or to put it more simply:

5 / .3 = 16.7

16.7 - 10 (original volume) = 6.7

And to check if this formula is now correct:

(5 mls (VG) / 16.7 (total volume)) x 100 = 29.94 % But we rounded up, so we weren't going to hit 30 exactly.

16.7-10 = 6.7

 

[steved5600]

LOL. Gah! How did I manage to do that? (Had it correct on my paper and somehow typed it in wrong. /facepalm)

*Always check your posts for errors before hitting submit. That's what I get for typing out by memory and not referring to my work. Ugh.

That is why LOL I like cut and paste. LOL
I do that all the time.

 

[Ray D]

16.7-10 = 6.7

I know. I feel like such a schmuck. lol

I really wish I spotted that before someone else did.

*original post edited and fixed (I hope)

 

[hamsterjack]

Thank You my friends for your help.

It's quite clear for me now.

Following Your way, if I want to do PG/VG like 60/40, then I need to add 2.5 ml of PG to 10 ml of VPG?

So check my formula, please:

VolumeVPG - Volume of 50/50 VPG I have - 10 ml
mlOfPG - Volume of PG in my VPG - 5 ml
mlOfVG - Volume of VG in my VPG - 5 ml
PercentVG - Percent of VG I would like to have - 40%
TotalVPG - Total VPG (after adding some PG) - ?
AddPG - Volume of PG I should add to VPG to have 60/40 ratio - ?

TotalVPG = (VolumeVPG / 2)/PercentVG => 12.50 = (10 / 2) / .4
AddPg=TotalVPG-VolumeVPG => 12.5 - 10.00 = 2.5

The whole formula may looks like:

AddPG = ( ( VolumeVPG / 2) / PercentVG ) - VolumeVPG ???

Regards and thank You very much in advance and patience

HamsterJack

 

[steved5600]

I had to fix an error I made forgot to round up. LOL

 

[Ray D]

Thank You my friends for your help.

It's quite clear for me now.

Following Your way, if I want to do PG/VG like 60/40, then I need to add 2.5 ml of PG to 10 ml of VPG?

So check my formula, please:

VolumeVPG - Volume of 50/50 VPG I have - 10 ml
mlOfPG - Volume of PG in my VPG - 5 ml
mlOfVG - Volume of VG in my VPG - 5 ml
PercentVG - Percent of VG I would like to have - 40%
TotalVPG - Total VPG (after adding some PG) - ?
AddPG - Volume of PG I should add to VPG to have 60/40 ratio - ?

TotalVPG = (VolumeVPG / 2)/PercentVG => 12.50 = (10 / 2) / .4
AddPg=TotalVPG-VolumeVPG => 12.5 - 10.00 = 2.5

The whole formula may looks like:

AddPG = ( ( VolumeVPG / 2) / PercentVG ) - VolumeVPG ???

Regards and thank You very much in advance and patience

HamsterJack

Looks good to me.

 

[hamsterjack]

Looks good to me.

Hi

Thank You very much for Your help.

Regards

HamsterJack