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Pure ethanol provides 7 kcal per gram. To find alcohol grams in a pour, multiply volume (mL) by ABV (as decimal) by ethanol density (0.789 g/mL).
Alcohol kcal = Volume(mL) × ABV × 0.789 × 7Mixers contribute calories from sugars (4 kcal/g). Simple syrup is approximately 50% sugar by weight. Juice, tonic, and cream liqueurs add significant non-alcohol calories that often exceed the spirit itself.
Updated: July 2026
Standard margarita with 80-proof tequila, 60-proof triple sec, and fresh lime juice.
→ ~210 kcal total
Highball with London dry gin and regular tonic water.
→ ~185 kcal (133 from gin + 52 from tonic sugar)
Regular tonic, juice, cream, and syrups can double a drink's calories. A Pina Colada gets more calories from coconut cream than from rum.
Higher-proof spirits have proportionally more calories. A 1.5 oz pour of 100-proof bourbon has ~25% more alcohol calories than 80-proof vodka.
Calculate total calories in a cocktail by summing alcohol calories and mixer calories. Alcohol contains 7 kcal per gram, making it the second most calorie-dense macronutrient. This tool helps bartenders and health-conscious drinkers understand the caloric impact of different spirit-mixer combinations.