Question: how many ounces in a large mcdonalds fries?
Answer: Today's large serves up 5.9 ounces of fried potatoes -- and 510 calories to boot. We can't be so surprised, then, that Americans' waistlines have increased as their sodas, burgers and fries have been seriously beefed up. In the early 1960s, the average American man weighed 166.2 pounds.