Carnation Instant Breakfast offers a variety of flavors and formulations, and each serving typically contains different calorie amounts. For the standard regular formulations, a serving of Carnation Instant Breakfast generally contains around 240 calories. However, the calorie content can vary depending on the specific formulation, including options that may be tailored for lower calorie intake or enhanced nutritional benefits. It is important to refer to the packaging for the precise calorie count of the specific flavor or formulation you may be interested in, as well as any other nutritional information that may be relevant. For the most accurate and up-to-date details, checking the nutritional information on the current web page is also a recommended approach.