Ive always had this problem too. I figured just through a rough estimation that a full dropper is about a mil. By full I mean as full as it allows you to get. I don't think you can get it full up to the cap... Another word of advice, put it in some kool aid or something. Research chem Clomid is one of the worst tasting things in the world. Way worse than liquid nolva, arimidex, or letro