What Is One Drink?

In the U.S., one drink is 14 grams of pure alcohol (0.6 fluid ounces). That is 12 ounces of regular beer, 5 ounces of wine, or 1.5 ounces of 80-proof liquor. The National Institute on Alcohol Abuse and Alcoholism (NIAAA) and the CDC both use this definition.

The catch is that your glass probably isn’t the average one. A bottle of wine is about five drinks, a fifth of liquor is about 17, and a handle is about 39. The 2025–2030 Dietary Guidelines, released in January 2026, no longer set a daily limit or define a drink, so counting what you actually poured matters more than it used to. This guide was last updated October 17, 2026, and its sources are listed at the end.

In this guide: what counts as one drink, drinks in a bottle of wine, drinks in a fifth, handle, or pint, what the guidelines say now, why your drink may be more, wine vs. beer, quick answers, and how the definition changed since 1980.

What is one drink?

Strengths are from the 2010 Dietary Guidelines and match the 2020–2025 edition. Our standard drink sizes guide covers more everyday examples.

How many drinks and glasses are in a bottle of wine?

About five of each. A standard 750 mL bottle is 25.4 fluid ounces, so it pours five 5-ounce glasses. At 12% that is five standard drinks, and at 14% it is almost six.

Pour a bigger glass and you get fewer glasses from the bottle but the same amount of alcohol: about four 6-ounce glasses or three 8-ounce glasses.

Wine labels are approximate, so the real number moves a little. Federal rules allow a label to be off by 1.5 percentage points for wines at or under 14% (27 CFR 4.36). A bottle labeled 12% can legally be anywhere from 10.5% to 13.5%, which works out to about 4.4 to 5.7 drinks. Our wine alcohol content guide lists typical strengths by type of wine.

How many drinks are in a fifth, a handle, or a pint?

A standard drink of 80-proof liquor is a 1.5-ounce shot, so a bottle pours about as many shots as it holds drinks. A “fifth” is a 750 mL bottle, a “handle” is 1.75 liters, and a 375 mL bottle is often called a “pint” (or half bottle). That is not the same as a 16-ounce beer pint, which is in the table too. Federal rules authorize all of these sizes for spirits and wine bottles come in 750 mL.

The wine bottle, half pint, pint, fifth, beer pint, bomber, and 40-ounce counts match NIAAA’s guide to common containers. The champagne, liter, handle, and six-pack rows use the same math. These counts assume the reference pours, and beer strength varies the most, so check the label. Our guides to hard liquor and vodka list the strength of common brands. For shot counts and pours by bottle size, see how many shots are in a fifth, handle, or liter.

How many drinks a day do the U.S. guidelines allow now?

None are specified anymore. The 2025–2030 Dietary Guidelines, released January 7, 2026, drop the numeric limit. Their alcohol section says to “consume less alcohol for better overall health” and lists people who should avoid alcohol completely: pregnant women, people recovering from alcohol use disorder or unable to control how much they drink, and people taking medications or with conditions that interact with alcohol. It does not define a drink, and the 10-page document does not mention cancer.

The edition before it (2020–2025) said 2 drinks or less a day for men and 1 drink or less for women, on days when alcohol is consumed. Some version of that limit ran from the 1990 edition on. The 2000 edition said it “is based on differences between the sexes in both weight and metabolism.”

A year before the new guidelines, the U.S. Surgeon General issued an advisory on alcohol and cancer risk. It says alcohol is the third leading preventable cause of cancer in the United States, after tobacco and obesity, and it recommends updating the Surgeon General’s warning label on alcoholic beverages.

The standard drink itself did not go away. NIAAA and the CDC still define it as 14 grams of pure alcohol, and NIAAA says that for people who choose to drink, “current research indicates the less, the better.” With no federal number to lean on, an accurate count of what you actually poured is the part you can control.

Is your drink really one drink?

Often it is not. The same studies that give the averages also show a wide spread inside each category.

• Size changes the count. A 16-ounce pint of 5% beer holds 0.8 fl oz of alcohol against the 0.6 fl oz standard, so it is about 1⅓ drinks.
• Beer is not one product. From 2011 to 2016, light beer stayed around 4.3%, craft beer rose from 4.9% to 5.3%, and flavored malt beverages rose from 5.9% to 6.5%, while craft beer’s market share grew by about 85% (Martinez 2019). NIAAA notes that some craft beers and flavored malt beverages are 8% to 9% ABV. A 12-ounce beer at 9% holds about 25 grams, or 1.8 standard drinks.
• Wine ranges widely. NIAAA says wine can range from about 5% to 16%.
• Spirits are not moving in one direction. The average rose from 36.9% to 38.3% between 2003 and 2016. Then NIAAA’s 2026 report flagged “a notable drop in average ABV for spirits,” from 37.2% in 2021 to 32.4% in 2024, and does not explain why.
• Beer labels are approximate too. They may be off by 0.3 points (27 CFR 7.65), and federal rules make a beer ABV statement optional.
• Real pours are bigger than reference pours. In a study of 310 U.S. drinkers drawn from a national survey, who measured their usual drinks at home, the average drink held 0.56 oz of alcohol for beer, 0.66 oz for wine, and 0.89 oz for spirits, compared with the 0.6 oz standard (Kerr 2005). A later review of the research found that over-pouring is the norm.

The practical lesson is that a drink count is only as good as the ABV and the pour behind it. If a drink is packaged, check the label. If it is a bar pour or a cocktail, treat the number as an estimate.

Is wine stronger than beer?

By volume, yes. In 2016 the average wine was 12.3% alcohol and the average beer was 4.74% (Martinez 2019), so wine has about two and a half times as much alcohol per ounce.

Per serving, the gap nearly disappears, because a standard glass of wine is 5 ounces and a standard beer is 12. That puts about 14.4 grams of alcohol in the average glass of wine and 13.3 grams in the average beer, both close to the 14-gram definition. That is also why a bottle of 12% wine holds about as much alcohol as five 12-ounce beers at 5%. Our beer alcohol content guide covers beer by brand and style.

Quick answers

How to count what you actually drank

Because averages hide so much, the most accurate way to count is to use the size and ABV of the drink in front of you. Our standard drink calculator does that conversion, and the BAC calculator lets you enter each drink with its size, strength, and time to see an estimated BAC curve. It is a formula-based estimate, not a breath or blood test. Do not use it to decide whether it is safe to drive.

Background: how the definition of one drink changed, 1980–2025

The federal government has published the Dietary Guidelines for Americans every five years since 1980, and every edition has said something about alcohol. Here is what each one said about the daily limit and the size of a drink.

You can open every edition on the DietaryGuidelines.gov archive. The 1980, 1985, and 1990 editions are scanned images, so the quotes above were read from the page scans.

The 1990 edition is worth reading in full. The section that introduced the 1-and-2 limits opens by saying alcoholic beverages “supply calories but little or no nutrients. Drinking them has no net health benefit, is linked with many health problems, is the cause of many accidents, and can lead to addiction. Their consumption is not recommended.” The guidance has not moved in one straight line.

Where the 14-gram standard drink comes from

Until 2010 the guidelines defined a drink only by pour size. Twelve ounces of beer, 5 ounces of wine, and 1.5 ounces of spirits were treated as equal because they contained roughly the same amount of alcohol. The 2010 edition added the strengths that make that true (5%, 12%, and 40%), and the 2015 edition expressed it as 14 grams of pure alcohol. The 2015 edition also notes that drink-equivalents “are not intended to serve as a standard drink definition for regulatory purposes.”

Background: did the average drink get stronger?

The pours in the guidelines stayed fixed from 1985 to 2020, but the alcohol in the average drink did not. The table shows the average alcohol by volume (ABV) of beer and wine sold in the U.S., and how many grams of alcohol that puts in the reference pour (12 oz of beer or 5 oz of wine). A standard drink is 14 grams.

The beer figures are sales-weighted averages of leading brands, so they are estimates rather than measurements of every can. For wine the best-documented change runs from 1991 to 2016, when the average rose from 10.5% to 12.3%. That is about 17% more alcohol in the same 5-ounce glass, and it moved the average wine from about 12.3 grams to about 14.4 grams. Average beer moved far less, from 4.58% in 1993 to 4.74% in 2016 (two different studies), or about 3.5%. The NIAAA, which publishes the national per-capita consumption tables, says the change in average alcohol content across beverage types has been “relatively minimal.”

Two caveats. First, studies can disagree: one Kerr paper estimated average beer at 4.33% for 1995, while the later 1988–2001 series gives 4.58% to 4.75%, so treat any single year as approximate (see Kerr and Greenfield 2003). Second, the 2003–2016 wine estimates rely on sales data from one state, which the authors list as a limitation.

What this guide could not confirm

• No government-hosted estimate of average beer ABV before 1988 or average wine ABV between 1962 and 1991, other than NIAAA’s fixed 1985 conversion values.
• No government-hosted estimate of average beer or wine ABV for 2017–2020.
• For the 2025–2030 edition, only the published 10-page Guidelines document was reviewed, not supporting scientific reports.
• The Surgeon General’s advisory is cited from HHS’s published summary of it. The full advisory was not reviewed for this guide.
• Glass, champagne, liter, handle, and six-pack counts above are arithmetic from the 0.6 fl oz (14 g) definition and standard container sizes, not figures from a source document.

Sources

Dietary Guidelines for Americans (USDA and HHS):

• Archive of previous editions, DietaryGuidelines.gov
• 1980, 1985, 1990, 1995, 2000, 2005, 2010, 2015–2020, 2020–2025, and 2025–2030
• USDA and HHS release for the 2025–2030 guidelines, January 7, 2026
• HHS: U.S. Surgeon General issues advisory on alcohol and cancer risk, January 3, 2025

Alcohol content and standard drinks:

• NIAAA: What is a standard drink?
• NIAAA: How many drinks are in common containers?
• NIAAA: Defining how much alcohol is too much
• CDC: About standard drink sizes
• NIAAA Surveillance Report #124, apparent per capita alcohol consumption, 1977–2024
• Martinez et al., 2019, Alcoholism: Clinical and Experimental Research (PMC)
• Kerr et al., 2004, mean ethanol content of beer, 1988–2001 (PubMed)
• Kerr and Greenfield, 2003, average ethanol content of beer (PubMed)
• Kerr et al., 2006, alcohol content of wine, 1962–2002 (PubMed)
• Kerr et al., 2005, variation in the amount of alcohol in drinks (PubMed)
• Kerr and Stockwell, 2012, understanding standard drinks and drinking guidelines (PMC)
• 27 CFR 4.36, wine alcohol content labeling (eCFR)
• 27 CFR 7.65, malt beverage alcohol content labeling (eCFR)
• 27 CFR 4.72, wine standards of fill (eCFR)
• 27 CFR 5.203, distilled spirits standards of fill (eCFR)