you dont need to weigh it cause you shouldnt use it recreationally but if you are determined just swallow three big soup spoons of it.
I think he meant Milligrams, not morning glory seeds. Ive heard of a method where you use 1/4 by 1/4 inch graph paper. somehow, one little square is equal to a certain amount of substance. I dunno, somebodies bound to know. Unfortunately, its not extremely accurate, so for dose-sensitive substances, you might just wanna purchas a digital balance.