How to count calories in alcohol, by drink and by mixer

By Eric Parker, founder of TrueCal. Published October 4, 2026. Sources checked October 4, 2026.

Written with AI assistance from the cited studies. Every claim was checked against its source. Editorial policy.

Key takeaways

Alcohol has about 7 calories per gram. A US standard drink holds about 14 grams of pure alcohol, so it comes to about 98 calories from the alcohol alone.¹³
USDA FoodData Central lists a 1.5 fl oz shot of 80 proof spirits at 97 calories, a 5 fl oz glass of red wine at 125 and a 12 fl oz can of regular beer at 153.⁶¹⁰⁸
The pour and the mixer change the total. Six fl oz of tonic water adds about 62 calories to a drink, club soda adds 0, and a 2 fl oz pour of 80 proof spirits is about 128 calories instead of 97.¹⁵¹⁶⁶
Log what was in the glass. That means the drink, how much was poured and every mixer, either as separate items or in one clear description.

Calories in alcohol, gram by gram

Calories in alcohol come from ethanol itself. FAO's 2003 technical report on food energy recommends a general conversion factor of 29 kilojoules per gram of alcohol, which is 7 calories per gram.¹

A plain shot shows the factor at work. USDA's record for 80 proof spirits gives a 1.5 fl oz jigger as 42 grams, with 14.0 grams of alcohol and 97 calories. Fourteen grams times 7 is 98, so nearly every calorie in a straight shot of gin, rum, vodka or whiskey comes from the alcohol.⁶¹

How big is a standard drink?

In the US, NIAAA defines a standard drink as about 14 grams, or about 0.6 fl oz, of pure alcohol. That amount is in a 12 ounce can of regular beer at 5 percent alcohol, a 5 ounce glass of wine at 12 percent, or a 1.5 ounce shot of distilled spirits at 40 percent.³

Because the alcohol in a standard drink is fixed, so are its alcohol calories. Fourteen grams at 7 calories per gram is about 98 calories in each standard drink, whether it comes as beer, wine or spirits.³¹

A can or a glass can hold more than one. NIAAA counts 8 to 10 fl oz of malt liquor, or of a flavored malt drink such as hard seltzer at about 7 percent alcohol, as one standard drink, and it notes that a 12 ounce beer at 10 percent alcohol is two.³

A standard drink is a unit for measuring alcohol. It isn't the serving size printed on a label, and the drink in front of you may hold more or less than one.

Alcohol calories by drink, from USDA records

These are USDA FoodData Central's numbers for common drinks at a common serving size. Each record lists calories and grams of alcohol per 100 grams, scaled here to the serving weight the same record gives.⁶⁸⁹¹⁰¹¹¹⁴

Drink	Serving	Calories	Alcohol
Spirits, 80 proof, gin, rum, vodka or whiskey	1.5 fl oz, 42 grams	97	14.0 grams⁶
Regular beer	12 fl oz, 356 grams	153	13.9 grams⁸
Light beer	12 fl oz, 354 grams	103	11.0 grams⁹
Red table wine	5 fl oz, 147 grams	125	15.6 grams¹⁰
White table wine	5 fl oz, 147 grams	121	15.1 grams¹¹
Coffee liqueur, 53 proof	1.5 fl oz, 52 grams	175	11.3 grams¹⁴

Why beer, wine and liqueur count for more than their alcohol

Beer has carbohydrate as well as alcohol. USDA's 12 fl oz regular beer has 13.9 grams of alcohol, worth about 97 calories, and 153 calories in all. Most of the rest comes from its 12.6 grams of carbohydrate.⁸¹

Dry wine sits closer to its alcohol. USDA's 5 fl oz glass of red has 15.6 grams of alcohol, about 109 calories, out of 125, with 3.8 grams of carbohydrate.¹⁰¹

Liqueurs are where sugar adds up. USDA's 1.5 fl oz serving of 53 proof coffee liqueur has 11.3 grams of alcohol, less than a shot of 80 proof spirits, yet it lists 175 calories, because it also has 24.3 grams of carbohydrate.¹⁴⁶

So the alcohol figure covers the alcohol only. For beer, cider, wine and liqueur, count the drink from its own label or database record, which includes the carbohydrate.

How to count calories in a mixed drink

A mixed drink is several foods in one glass. Count each part by the fluid ounce, then add them up.

The spirit. USDA's 80 proof record works out to about 64 calories per fl oz, so pours of 1, 1.5 and 2 fl oz come to about 64, 97 and 128 calories.⁶
The mixer. Per USDA, tonic water is about 10 calories per fl oz, regular cola about 13, fresh orange juice about 14, bottled cranberry juice cocktail about 17 and club soda 0.¹⁵¹⁷¹⁸¹⁹¹⁶
Syrups, liqueurs and sweetened garnishes. Log each one by its amount, like any other food.
Ice and plain water add nothing, though they do take up room in the glass.

Tonic water and club soda look the same in the glass

Tonic water is sweetened. USDA lists it at 34 calories and 8.8 grams of sugar per 100 grams, and lists club soda at 0 calories and 0 grams of sugar. Six fl oz of tonic adds about 62 calories, and the same amount of club soda adds none.¹⁵¹⁶

Name the mixer when you log, because the two can't be told apart by looking. A sugar-free tonic is a different product with its own label.

How to count a drink from its alcohol percentage

When a can or bottle shows its alcohol percentage but no calories, you can still work out the alcohol calories.

Multiply the fluid ounces by the alcohol percentage written as a decimal. That gives the fluid ounces of pure alcohol.
Divide by 0.6. NIAAA counts about 0.6 fl oz of pure alcohol, about 14 grams, as one standard drink.³
Multiply the standard drinks by about 98, the calories in 14 grams of alcohol at 7 per gram.³¹
Add the carbohydrate calories if the label lists carbohydrate, plus any mixer.

The pour and the mixer change the total more than the variety

NIAAA's own example shows the method. A 12 ounce beer at 10 percent alcohol holds 1.2 fl oz of pure alcohol, which is 2 standard drinks and about 196 calories from the alcohol alone, before its carbohydrate.³¹

Within one type of drink, the records sit close together. USDA lists a 5 fl oz glass of Cabernet Sauvignon at 122 calories and of Zinfandel at 129, a gap of 7. Pour 7 fl oz of red instead of 5, and the glass goes from 125 calories to about 175, a gap of 50.¹²¹³¹⁰

Mixed drinks work the same way. Tonic in place of club soda adds about 62 calories to a 6 fl oz mixer, and a 2 fl oz pour of spirits in place of 1.5 adds about 31.¹⁵¹⁶⁶

The two details worth getting right are how much was poured and what it was mixed with.

How to log what was in the glass

A drink log works the same way as a food log. Each entry needs a drink, an amount and its add-ins.

Log each drink when you have it, with its size in fluid ounces or as the can or bottle size.
At home, find your usual pour once. Fill your usual glass with water to your usual line, then pour it into a measuring cup.
Out, log the size you were served. Wine glasses and free pours vary, so note a large or small pour if you can tell.
Log the mixer as its own item with its amount, or name it in the description, such as vodka with 6 fl oz of tonic water.
For a cocktail with several parts, list each part with its amount, or log the recipe once and save it.

What studies found about alcohol calories and eating

Yeomans' 2010 review found that calories from alcohol are added to calories from other food rather than offset, which leads to taking in more energy in the short term. It also found that alcohol taken before or with a meal tends to increase how much food is eaten. Long-term population data were less consistent than the laboratory results.⁴

Traversy and Chaput's 2015 review describes the research on alcohol and body weight as mixed. It notes that alcohol's 7 calories per gram can add to weight gain if they aren't balanced elsewhere, found heavy drinking more consistently linked with weight gain than lighter intake, and called for better studies of who is affected.⁵

In a calorie log, a drink counts the same as food. When a drink comes with a meal, log both.

A note on medical advice

This article is for general information and isn't medical advice. If you have questions about alcohol and your health, talk with a clinician.

Worked example

Say you mix a vodka tonic at home and pour without a jigger. You pour water into the same glass to the same line, measure it, and it comes to 2 fl oz. USDA lists 80 proof spirits at 231 calories per 100 grams, and 1 fl oz weighs 27.8 grams, so 2 fl oz is 55.6 grams and about 128 calories. Tonic water is 34 calories per 100 grams, and 6 fl oz weighs about 183 grams, so the tonic adds about 62. The drink comes to about 190 calories. With a measured 1.5 fl oz shot, the spirit is 97 calories and the drink is about 159. With club soda instead of tonic, the mixer adds 0. With 6 fl oz of regular cola, at 42 calories per 100 grams, it adds about 77. Log it as 2 fl oz of vodka with 6 fl oz of tonic water, and the entry matches the glass.⁶¹⁵¹⁶¹⁷

A closer look

The 7 calories per gram used for alcohol is a rounded general factor. FAO's 2003 report on food energy gives Atwater's unrounded value as 6.9, and reports that the newer net metabolizable energy system puts alcohol at 6.3, about 10 percent lower, which FAO links to heat the body produces after alcohol is consumed. FAO still recommends 7 as the general factor, and USDA's record for 80 proof spirits lines up with it. That record lists 33.4 grams of alcohol per 100 grams, and 33.4 times 7 is about 234 calories, against the 231 USDA lists.²¹⁶

Questions and answers

How many calories are in a shot of vodka?

USDA lists a 1.5 fl oz jigger of 80 proof spirits, a record that covers gin, rum, vodka and whiskey, at 97 calories. Higher proof lists more. The 90 proof record is 263 calories per 100 grams, or about 110 per jigger.⁶⁷

Does beer or wine have more calories?

Per usual serving in USDA's records, a 12 fl oz regular beer lists 153 calories and a 5 fl oz glass of red wine lists 125. Per fluid ounce, wine is higher, about 25 calories against about 13 for beer.⁸¹⁰

Do calories from alcohol count the same as calories from food?

In a calorie count, yes. FAO's general factor is 7 calories per gram of alcohol, and Yeomans' 2010 review found that alcohol calories add to food calories rather than replace them.¹⁴

Is a hard seltzer one standard drink?

NIAAA counts 8 to 10 fl oz of a flavored malt drink such as hard seltzer, at about 7 percent alcohol, as one standard drink. A bigger can or a different strength changes that, so check the size and the percentage on the can.³

Log the drink the way you'd say it

Log calories by hand for free. With Pro, type something like 2 fl oz of vodka with 6 fl oz of tonic water and TrueCal turns it into calories and macros, and you can save meals you log often to reuse.

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Sources

Food Energy, Methods of Analysis and Conversion Factors, chapter 4. FAO. 2003.
Food Energy, Methods of Analysis and Conversion Factors, chapter 3. FAO. 2003.
What Is a Standard Drink?. National Institute on Alcohol Abuse and Alcoholism. 2025.
Physiology and Behavior. Yeomans. 2010.
Current Obesity Reports. Traversy, Chaput. 2015.
USDA FoodData Central, Alcoholic beverage, distilled, all (gin, rum, vodka, whiskey) 80 proof. U.S. Department of Agriculture. 2019.
USDA FoodData Central, Alcoholic beverage, distilled, all (gin, rum, vodka, whiskey) 90 proof. U.S. Department of Agriculture. 2019.
USDA FoodData Central, Alcoholic beverage, beer, regular, all. U.S. Department of Agriculture. 2019.
USDA FoodData Central, Alcoholic beverage, beer, light. U.S. Department of Agriculture. 2019.
USDA FoodData Central, Alcoholic beverage, wine, table, red. U.S. Department of Agriculture. 2019.
USDA FoodData Central, Alcoholic beverage, wine, table, white. U.S. Department of Agriculture. 2019.
USDA FoodData Central, Alcoholic Beverage, wine, table, red, Cabernet Sauvignon. U.S. Department of Agriculture. 2019.
USDA FoodData Central, Alcoholic Beverage, wine, table, red, Zinfandel. U.S. Department of Agriculture. 2019.
USDA FoodData Central, Alcoholic beverage, liqueur, coffee, 53 proof. U.S. Department of Agriculture. 2019.
USDA FoodData Central, Beverages, carbonated, tonic water. U.S. Department of Agriculture. 2019.
USDA FoodData Central, Beverages, carbonated, club soda. U.S. Department of Agriculture. 2019.
USDA FoodData Central, Beverages, carbonated, cola, regular. U.S. Department of Agriculture. 2019.
USDA FoodData Central, Orange juice, raw. U.S. Department of Agriculture. 2019.
USDA FoodData Central, Cranberry juice cocktail, bottled. U.S. Department of Agriculture. 2019.