A single Oreo cookie contains approximately 53 calories, of which approximately 41% comes from fats and around 44.5% comes from sugars. In terms of fats, an Oreo cookie has about 2 grams, which translates to roughly 18 calories (34% of the total caloric content). This is considering that 1 gram of fat equals about 9 kcal. Regarding sugars, an Oreo cookie contains around 6.5 grams of sugar, equating to nearly 24 calories (45.2% of the total calories) since each gram of sugar contains approximately 3.7 kcal.