Honestly I never corralated liquid amounts to packs.There are too many variables.
There was a poll done on the forum that came out that most adverage smokers will use 20 to 30 ml a week. If you are a real light smoker less, heavy smoker towards the 30 ml more.
Most people when first starting tend to literally vape their brains out . Thats normal.
It is the body seeking the other 4000 chemicals in cigs and not finding it in vape. It passes in a week or so.
I personally choose to keep my nic level at 14 and just vape myself silly.
Some choose to up the nic level. But be careful, you can get a real high nic and make yourself sick doing that.
good luck with your vaping journey!
Hope that helps.
30ml a weeks would make that 18.50 per 30ml just about 80$ per month for liquid alone....yikes