Does Coconut Rum Have Carbs - LiquorTalkClub.com Diageo notes that there are 1.6 grams of carbs in a 40-milliliter serving of 70 proof Lime Bite rum, of which 1.3 grams of carbs are from sugar. The Parrot Bay Coconut Rum is one of the varieties with a high carbohydrate content. A 40-milliliter serving of 90 proof Parrot Bay Coconut Rum has 9.2 grams of carbs, per Diageo.