One ounce of dark chocolate contains 155 to 170 calories, depending on the percentage of cocoa solids. Dark chocolate contains 45 to 85 percent cocoa solids. Chocolate with over 60 percent cocoa solids contains more calories but also provides more nutritional benefits.
One ounce of dark chocolate that contains 45 to 59 percent cocoa solids has 155 calories. Chocolate with 60 to 69 percent cocoa solids contains 164 calories per ounce. Dark chocolate with 70 to 85 percent cocoa solids contains 170 calories in 1 ounce.
Dark chocolate is a good source of nutrients. The amount of minerals, proteins and fiber in dark chocolate usually rises as the percentage of cocoa solids increases, while the sugar and carbohydrate content becomes lower.