Since the flavor added to coffee during the roasting process is from concentrated oils and natural sugars, these coffees have no additional calories.  Interestingly enough, black coffee is definitely a low-calorie drink. But, contrary to popular opinion, it is not a zero-calorie drink. A cup of black coffee ranges from one to five calories depending on the beans, the depth of the roast, and the brewing method. A filtered drip brewing method, whether from a pour-over or automatic drip pot, will give you the lowest-calorie cup of coffee.  And, even if you add a little cream and sugar, coffee is still a lower-calorie option than most other juices and soft drinks.