Calories in Malibu Original Rum with Coconut Flavour (21% alc ... There are 151 calories in 1 serving (2.5 fl. oz) of Malibu Original Rum with Coconut Flavour (21% alc.). You'd need to walk 42 minutes to burn 151 calories. Visit CalorieKing to see calorie count and nutrient data for all portion sizes.