Sue, not sure what you mean there.....
"to calculate mg/ml we need to know how much oil you added to how much plant material for each batch."
Can you please elaborate on that, for me, for when I'm ready to make my own oils from scratch.
Do you mean how much carrier oil to how much Raw plant material?
Here's the formula for calculation:
Infused oils are considered to have an extraction efficiency of 85%, so the first thing you do is calculate the multiplier. Let's use 10% THC as an example.
10% x 0.85 = 8.5% =0.085
Now, multiply that times the total grams of plant material you'll be using. I'll use 400 gr.
0.085 x 400 = 34 grams of THC available in that 400 grams of plant material.
Next, multiply that times 1000 to get the total mg of THC available.
34 x 1000 = 34,000 mg of THC available
Lastly, divide the total available mg by the total volume of carrier oil you start with. You won't get all of that back, because some of it will stay bound up in the plant material. For this example I'll say I'm using 12,000 ml of carrier oil.
34,000 / 12,000 = 2.8 mg of THC per ml of finished oil.
You have oils already prepared by Lady G, correct? Or are you making oil from scratch?