An 8-ounce (240 mL) cup of black coffee contains about 2 calories. This calorie count is consistent regardless of the brewing method and is very low because black coffee is mostly water with minimal macronutrients like protein, fat, or carbohydrates
. Adding milk, cream, sugar, or other flavorings will increase the calorie content significantly, but plain black coffee itself remains a very low- calorie beverage
