There is no common dosage for CBD. It greatly depends on the symptoms being treated, body weight, and tolerance. In addition, everyone’s metabolism and the endocannabinoid system is different, which can yield unique results for each person.
The best way to find your dosage is to start low and then progressively increase your dose. Start with the minimal dosage, 1 to 2 mg of CBD, and wait about six hours until your next dose. Gradually increase your dosage each time by 2-3 mg. Monitor closely how you feel after each dose. As soon as you experience positive effects, stick with this dosage.
The average CBD user takes an average of 10-40 mg per day. For serious conditions like pain and inflammation, some users take as much as 200-1000 mg per day.
Important for your calculation is that there is approximately 0.5-2 mg CBD per puff depending on the vape juice and the vaping method you are using.