PianoStan
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This thread has become rather long, and the formulas are already posted, but I'll put a quick (for me) answer to your questions here.How exactly do you calculate the amount to put into the food if you don't know the thc percentage of your buds? I'm not really sure how to do it even if I did know. My wife really likes edibles and be cool to surprise her with some homemade ones. But I wouldn't want to mess her up too much. She can only eat about 25mg at a time. I can only get edibles in the shops. It's a 3.5 hour round trip for me to even get her some. Be cool to not have to do that anymore to.
If you don't know the strength of the marijuana that you have on hand, it's best to assume that it is 20% (200mg THC/gram). Especially if you have good bud. While pot can range from 10-45%+, the overwhelming majority of strains commonly available sit comfortably in the 18-22% range. 20% sits right in the middle.
As far as how to actually do it the formula isn't complex. It goes like this:
- (Desired dosage per serving) x (total number of servings) = (total number of mg needed)
- (total number of mg needed) / (potency of bud) = (amount of bud needed)
- (25mg/brownie) x (9 brownies) = (225mg THC total)
- (225mg total) / (200mg/g) = (1.125 grams marijuana)
Then, it's as simple as following the recipe, or instructions on the box.
You can get a lot more technical than that, but those are the simple steps to creating a good product.
Personally, I don't just infuse a couple of grams at a time. If I make canna-butter, I will infuse a pound of butter at the strength that I want it, and freeze whatever I don't use so that I can have it ready whenever I need it. But you can infuse make small infusions as needed if that is your decision.