A small AMC Movie Theatre popcorn, without butter, equates to 11 points at Weight Watchers. It contains 400 to 500 calories. The butter topping increases the Weight Watchers point count drastically; a large portion with butter is 40 points.
A 2009 study by the Center of Science in the Public Interest found that AMC popcorn was popped in coconut oil, which contains 90 percent saturated fat and accounts for much of the caloric content. In a 2012 study by Dr. Vinson, professor of chemistry at the University of Scranton, it was discovered that popcorn contains more healthy antioxidants than some fruits and vegetables.