Alcohol Calories Calculator — Per Drink, Week & Year
Calculate the calories in any drink from its size, strength (ABV) and sugar, see how many standard drinks and UK units it contains, and what your weekly drinking adds up to over a year.
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Common Drinks Compared
Calories, standard drinks and UK units per serving, calculated with the same formula.
| Drink | Serving | Calories | Std Drinks | UK Units |
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How this calculator works
Calories in a drink come from two sources — the alcohol itself and any carbohydrate (sugar and starch):
- Alcohol (g) = volume (mL) × ABV ÷ 100 × 0.789 (the density of ethanol)
- Calories = alcohol (g) × 7 + carbs (g) × 4
- US standard drinks = alcohol (g) ÷ 14 · UK units = alcohol (g) ÷ 8 (10 mL of pure alcohol)
Preset carb values are typical figures from USDA FoodData Central; check the label for your brand, as beers, ciders and cocktails vary widely.
By Suhaib Hassan · Reviewed 28 September 2026 against NIAAA, UK CMO and U.S. Dietary Guidelines · How CalculatePilot verifies formulas →
A worked example
A 12-oz (355 mL) regular beer at 5% ABV: 355 × 0.05 × 0.789 = 14.0 g of alcohol — exactly one US standard drink — giving 98 kcal. Its 13 g of carbs add 52 kcal, for about 150 kcal. Three beers twice a week is 900 kcal a week, or about 47,000 kcal a year.
What the guidelines say
The Dietary Guidelines for Americans, 2025–2030 advise consuming less alcohol for better overall health, and say pregnant women, people recovering from alcohol use disorder, and people whose medications or conditions interact with alcohol should avoid it completely. (The previous 2020–2025 edition set limits of 2 drinks or fewer a day for men and 1 or fewer for women.) The UK Chief Medical Officers advise drinking no more than 14 units a week, spread over three or more days.
Why alcohol calories are easy to overlook
At about 7 kcal per gram, alcohol is more energy-dense than carbohydrate or protein (4 kcal/g) and just below fat (9 kcal/g). Drinks are rarely tracked as closely as food, and sugary mixers, syrups and juices can double a cocktail's calories.
Sources
- NIAAA — What is a standard drink?
- Dietary Guidelines for Americans, 2025–2030
- UK Chief Medical Officers. UK Chief Medical Officers' Low Risk Drinking Guidelines. Department of Health, 2016.
- USDA FoodData Central (typical carbohydrate per serving)
Frequently asked questions
Why does alcohol have more calories than carbs or protein?
Alcohol provides about 7 calories per gram, compared with 4 calories per gram for carbohydrates and protein — a big part of why drinks add up faster than their serving size might suggest.
Are cocktails always higher in calories than beer or wine?
Often, but not always — it depends on the recipe. Cocktails with sugary mixers, syrups or cream can be far higher in calories than a spirit with soda water or a glass of dry wine.
What is a standard drink?
In the United States, one standard drink contains about 14 grams (0.6 fl oz) of pure alcohol — roughly a 12-oz beer at 5%, a 5-oz glass of wine at 12%, or a 1.5-oz shot of 40% spirits. A UK unit is smaller, at 8 grams.
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