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Drink size calculator

Do you know how many “standard drinks” are in a:

Chances are, your cup or beverage label won't tell you the answer—but this calculator will. See this drop-down menu for common container sizes and alcohol content for different beverages.


(The alcohol content of different types of beer, other malt beverages, and wine may vary.)

What's the alcohol content of the beverage? (convert proof to alc/vol)
U.S. standard drink size (containing 14 g "pure" alcohol)
What's the container size? (convert to fl. oz. if needed)
Number of U.S. standard drinks per container

Why is this information important?

Knowing standard drink sizes and the number of drinks per container can help you make informed decisions about your drinking. You’ll be able to:

Can't find your beverage on the menu?

To check beverages or container sizes not listed in the drop-down menu, you can enter your own amounts into the calculator. Here’s how:

  • Find the alcohol content of the beverage. For all distilled spirits and most wine, the container label lists the percent "alcohol by volume" or alc/vol. Many beer and malt liquor labels do not list this information, however. To find it, search online for the beverage bottler or other reliable sources.
  • Enter the alc/vol in the first column of the calculator.
  • Enter the container size in the third column of the calculator.

The calculator will show you how many standard drinks the container holds.

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Disclaimer: This calculator is for educational purposes only, to show how the number of standard drinks and the alcohol content (% alc/vol) of a cocktail can vary depending on the type of spirits and the recipe. Any differences between the data you enter in the calculator and the actual amount in a drink could significantly affect the accuracy of the estimates. Because of this and individual variations in alcohol sensitivity and metabolism, the calculator should not be relied upon to predict blood alcohol level or any other measure. Do not drink if you are under the legal age (21 in the United States), and do not drive or engage in other potentially dangerous activities after drinking.

Is your "lite" beer light in alcohol?

Not necessarily. Although they have fewer calories, many light beers have almost as much alcohol as regular beer—about 85% as much, or 4.2% versus 5.0% alcohol by volume, on average.

Check the alcohol content of your beverage. Malt beverages are not required to list their alcohol content on the labels, so you may need to visit the bottler's Web site.

See What's a standard drink?

How many "drinks" are in a bottle of wine?

A typical 25-ounce (750 ml) bottle of table wine holds about 5 "standard" drinks, each containing about 5 ounces. This serving size of wine contains about the same amount of alcohol as a 12-ounce regular beer or 1.5 ounces of 80-proof spirits.

Get to know what 5 ounces looks like by measuring it out at home. That way you can estimate how many standard drinks you're being served in a restaurant or bar that uses large glasses and generous serving sizes.

See What's a standard drink?

Mixing alcohol with certain medications can cause nausea, headaches, drowsiness, fainting, a loss of coordination, internal bleeding, heart problems, and difficulties in breathing. Alcohol can also make a medication less effective. For more information, see Harmful Interactions: Mixing Alcohol with Medicines.

Examples of medical conditions for which it's safest to avoid drinking include liver disease (such as from hepatitis C), bipolar disorder, abnormal heart rhythm, and chronic pain.

Among the dangers of underage drinking:

Even moderate amounts of alcohol can significantly impair driving performance and your ability to operate other machinery, whether or not you feel the effects of alcohol.

Heavy drinking during pregnancy can cause brain damage and other serious problems in the baby. Because it is not yet known whether any amount of alcohol is safe for a developing baby, women who are pregnant or may become pregnant should not drink.

Highest risk

About 50% of people who drink in this group have an alcohol use disorder.

Increased risk

This "increased risk" category contains three different drinking pattern groups. Overall, nearly 20% of people who drink in this category have an alcohol use disorder.

Low-risk drinking

Only about 2% of drinkers in this group has an alcohol use disorder.

A U.S. "standard" drink contains about 0.6 fluid ounces or 14 grams of "pure" alcohol. That's the amount in 12 ounces of regular beer, 5 ounces of table wine, or 1.5 ounces of 80-proof distilled spirits.

Low risk drinking levels - On any single day: Men, no more than 4 drinks on any day. Women, no more than 3 drinks on any day. Per week: Men, no more than 14 drinks per week. Women no more than 7 drinks per week.

Distilled spirits include vodka, whiskey, gin, rum, and tequila.

Light to moderate drinking

Heavy or at-risk drinking

Low-risk drinking

Men: No more than 4 drinks on any day and no more than 14 per week

Women: No more than 3 drinks on any day and no more than 7 per week

People with a parent, grandparent, or other close relative with alcoholism have a higher risk for becoming dependent on alcohol. For many, it may be difficult to maintain low-risk drinking habits. For more information, see A Family History of Alcoholism: Are You at Risk?

Pace yourself: It's best to have no more than one standard drink per hour, with nonalcoholic "drink spacers" between alcohol beverages. On any day, stay within low-risk levels of no more than 4 drinks for men or 3 for women. Note that it takes about 2 hours for the adult body to completely break down a single drink. Do not drive after drinking.

For comparison, regular beer is 5% alcohol by volume (alc/vol), table wine is about 12% alc/vol, and straight 80-proof distilled spirits is 40% alc/vol.

The percent alcohol by volume (alc/vol) for distilled spirits is listed on bottle labels and may be found online as well. It is half the "proof," such that 80-proof spirits is 40% alc/vol.

Convert proof to alc/vol

Enter in the proof of the alcohol in the left field to automatically calculate the alc/vol.


  
 

Convert to fluid ounces

Enter in the measurement in milliliters in the left field to automatically calculate the amount in fluid ounces.