Thanks Seamaiden I am aware of that. I also know that on average trim contains approx 10% THC. That can obviously go up or down depending on the quality of the bud you trimmed, also if it has buds in it then it will raise the THC level as well. I tend to have the same strains same pheno's that I run. I am looking for some basic general formula that will give me a ball park of the strength. My edibles are just for me and a couple of patients mostly, I do not sell them so I cannot justify going to have them tested.