[url]http://nutritiondata.self.com/facts/vegetables-and-vegetable-products/2667/2[/url]
That site says 200 grams has 180 calories, but it sorta looks like that is cooked. I have a sweet potato about 6x3 inches and weighed it and it's a little over a pound (480 grams), so by that logic this one potato has over 400 calories in it, which I find hard to believe considering a regular potato of about this size would have 200 calories or less .... ???