It's good to know the volume of your gummy molds. Let's say you have a gram of decarbed concentrate at 80% THC. That means it has 800 milligrams (80%x 1000mg) of THC. 1/4 of that gram would be 200 mgs THC. It's just math. divide in 20 equal parts: 10/part.
Let's say you buy 7 grams cannabis @...