An 0.8-ounce serving size of Malibu Rum has 48 calories and 5.1 grams of carbohydrates, according to My Fitness Pal. A 1-ounce serving of citrus-flavored Malibu rum has 69 calories and 6 grams of carbs. Calorie Secrets points out that most liquors, including whiskey, vodka, tequila, gin, cognac and brandy have around 65 calories or so per serving.
Eighty-proof vodka has just 64 calories per 1 -ounce serving while 86 proof vodka has 70 calories, 90 proof has 73 calories and 100 proof has 82 calories. By comparison, a glass of wine generally has from 125 to 150 calories while a 12-ounce beer has anywhere from 64 calories to 198 calories, notes WebMD.
Some cocktails are laden with calories, advises WebMD. For example, the frozen mudslide served at TGI Fridays as of 2015 has 1,100 calories.
Alcohol has 7 calories per gram. By contrast, carbohydrates have just 4 calories per gram and fat has 9 calories of energy in each gram, according to Calorie Secrets. To avoid weight gain from drinking alcohol, forgo cocktails and go for light beer, white or red wine, champagne or a shot of liquor. Drink mixers are full of sugars and can contain hundreds or even thousands of calories when mixed into oversized cocktails.