A regular cup of black coffee has two calories. However, where most people find the bulk of their calories in relation to coffee is in the items they add to it.
Most people counting calories often forget to include the calories they drink. Coffee on its own isn't too bad, but when other things get added to it, that's when the calories start adding up. For instance, heavy whipping cream adds 52 calories to a regular cup of coffee. Table sugar adds 49 calories, half-and-half adds 20 calories, and fat-free milk adds five calories. A grande vanilla latte with 2 percent milk from Starbucks, which is, one of their most ordered drinks, , is 250 calories.