How many standard drinks are in a beer? A 12 oz beer at 5% alcohol by volume (ABV) is exactly one U.S. standard drink. A 16 oz can at 5% is about 1.3 standard drinks, and a 16 oz IPA at 7% is closer to 1.9. The answer changes with both the size of the container and the strength printed on the label.
That is why "I had three beers" can mean anything from three standard drinks to more than five. This guide gives you the numbers for common sizes, a formula you can use with any label, and a few worked examples, including the frequently searched "how many drinks are in three 16 oz beers?"
What counts as one standard drink of beer?
In the United States, one standard drink contains about 14 grams (0.6 fluid ounces) of pure alcohol. The CDC and NIAAA use a 12 oz beer at about 5% ABV as the reference example for that amount.
The definition is about pure alcohol, not about the container. A drink is "standard" only if it contains that 14 grams. Many beers do not:
- Light beers around 4% ABV contain a little less than one standard drink per 12 oz.
- Craft lagers and pale ales around 5.5% to 6% contain a little more.
- IPAs, double IPAs, and imperial stouts at 7% to 10% can contain two or more standard drinks in a single can.
Other countries use different definitions. A UK unit is 8 grams of alcohol, and an Australian standard drink is 10 grams. If you track in UK units, see how many units are in a pint of beer or a can of beer instead.
How many standard drinks are in a beer, by size and ABV?
The table below uses the U.S. definition of 0.6 fl oz of pure alcohol per standard drink.
| Beer size | 4% ABV | 5% ABV | 6% ABV | 7% ABV | 8% ABV | 9% ABV |
|---|---|---|---|---|---|---|
| 12 oz can or bottle | 0.8 | 1.0 | 1.2 | 1.4 | 1.6 | 1.8 |
| 16 oz can or U.S. pint | 1.1 | 1.3 | 1.6 | 1.9 | 2.1 | 2.4 |
| 19.2 oz can (UK pint size) | 1.3 | 1.6 | 1.9 | 2.2 | 2.6 | 2.9 |
| 24 oz can | 1.6 | 2.0 | 2.4 | 2.8 | 3.2 | 3.6 |
| 40 oz bottle | 2.7 | 3.3 | 4.0 | 4.7 | 5.3 | 6.0 |
Two patterns are worth remembering. A 16 oz can holds one third more beer than a 12 oz can, so it holds one third more alcohol at the same strength. And every extra percentage point of ABV adds about 0.27 standard drinks to a 16 oz pour.
How many standard drinks are in a 16 oz beer?
At 5% ABV, a 16 oz beer is about 1.3 standard drinks. At 6% it is 1.6, and at 7% it is about 1.9. Many craft IPAs sold in 16 oz "tallboy" cans fall into the 6.5% to 7.5% range, so treating each one as a single drink undercounts by almost half.
How many standard drinks is a pint?
A U.S. pint is 16 oz, so the 16 oz row applies: about 1.3 standard drinks at 5%. An imperial (UK) pint is larger at 568 ml, or about 19.2 U.S. fl oz. At 5% that comes to about 1.6 U.S. standard drinks. Bar "pint" glasses also vary, and some hold 14 oz once you allow for foam, so ask or check the menu when you can.
The standard drink formula for any beer
You do not need a table if you have the label. Use:
standard drinks = ounces × ABV ÷ 0.6
Write the ABV as a decimal (5% = 0.05). For example:
- A 16 oz can at 6.8% ABV: 16 × 0.068 = 1.088 oz of alcohol.
- Divide by 0.6: 1.088 ÷ 0.6 = 1.8 standard drinks.
If the container is in millilitres, convert first: divide millilitres by 29.57 to get U.S. fluid ounces. A 500 ml can is about 16.9 oz.
The standard drink calculator runs the same math and handles millilitres, ounces, and unusual ABVs, which is useful when you are logging several different beers in one evening.
Worked example: how many drinks are in three 16 oz beers?
Three 16 oz beers at 5% ABV contain 3 × 1.33 = 4.0 standard drinks. If those three were 7% IPAs, the total is 3 × 1.87 = 5.6 standard drinks. The number of cans stayed the same, but the alcohol went up by 40%.
Worked example: a light beer
A 12 oz light beer at 4.2% ABV: 12 × 0.042 ÷ 0.6 = 0.84 standard drinks. Light beer is lower in alcohol, but not dramatically so. Six light beers still contain about five standard drinks.
Common beer styles and their typical strength
ABV varies by brand, so always prefer the label. As a rough guide:
| Style | Typical ABV range | 12 oz standard drinks | 16 oz standard drinks |
|---|---|---|---|
| Light lager | 3.5%–4.5% | 0.7–0.9 | 0.9–1.2 |
| Standard lager or pilsner | 4.5%–5.5% | 0.9–1.1 | 1.2–1.5 |
| Pale ale | 5%–6% | 1.0–1.2 | 1.3–1.6 |
| IPA | 6%–7.5% | 1.2–1.5 | 1.6–2.0 |
| Double or imperial IPA | 8%–10% | 1.6–2.0 | 2.1–2.7 |
| Imperial stout or barleywine | 9%–12% | 1.8–2.4 | 2.4–3.2 |
| Hard seltzer | 4%–5% | 0.8–1.0 | 1.1–1.3 |
These ranges explain why counting cans is unreliable. One double IPA can contain as much alcohol as two or three light beers.
Why counting beers accurately matters
Standard drinks are the measure used in U.S. dietary guidance and in most research on alcohol and health. The *Dietary Guidelines for Americans* describe moderate drinking for adults who choose to drink as up to two drinks a day for men and up to one for women, and note that drinking less is better for health than drinking more. Those limits are written in standard drinks, not cans.
If your usual beer is a 16 oz 7% IPA, two cans are already close to four standard drinks. People who count containers rather than alcohol tend to underestimate their weekly total, sometimes by a lot.
Accurate counts also help you:
- See real trends. A week of "two beers a night" might be 14 standard drinks or 26, depending on what was poured.
- Plan alcohol-free days. It is easier to set goals when the baseline is accurate. See mindful drinking and alcohol-free days for ideas.
- Avoid overconfidence. A standard drink count is not a blood alcohol reading. Do not use beer counts to decide whether it is safe to drive.
Track beer by size and strength, not by can
The simplest habit is to log the size and ABV of each beer rather than a tally. That turns "three beers" into an accurate number automatically.
Alcohol Tracker° for iPhone and Apple Watch lets you log a drink with its volume and ABV in a couple of taps, then shows standard drinks per day and per week. You can [see how Alcohol Tracker° works](/) or start with the free calculator if you just want a quick answer.
Frequently Asked Questions
Is one beer one standard drink?
Only if it is about 12 oz at around 5% ABV. A 16 oz can, a stronger craft beer, or a 19.2 oz can is more than one standard drink. Light beers in 12 oz cans are slightly less than one.
How many standard drinks are in a 16 oz IPA?
Most IPAs are 6% to 7.5% ABV, so a 16 oz can contains about 1.6 to 2.0 standard drinks. A double IPA at 8% to 10% contains about 2.1 to 2.7.
How many standard drinks are in a 24 oz beer?
A 24 oz can at 5% ABV contains 2.0 standard drinks. At 8% it contains 3.2, and at 9% it contains 3.6. Large single cans are often stronger than regular lager, so check the label.
How many standard drinks are in a 6-pack of beer?
A 6-pack of 12 oz cans at 5% ABV contains 6 standard drinks. A 4-pack of 16 oz cans at 7% contains about 7.5 standard drinks, more than the 6-pack despite having fewer cans.
Does a standard drink of beer have the same alcohol as a shot?
Yes, by definition. A 12 oz beer at 5%, a 5 oz glass of wine at 12%, and a 1.5 oz shot of 40% spirits each contain about 0.6 fl oz of pure alcohol. The volume differs because the strength differs.
The quick answer
How many standard drinks are in a beer? A 12 oz beer at 5% is one standard drink. A 16 oz beer at 5% is about 1.3, and a 16 oz IPA at 7% is about 1.9. Multiply ounces by ABV and divide by 0.6 for any other beer, and log the size and strength rather than counting cans.
Sources: CDC standard drink sizes, NIAAA: What is a standard drink?, and Dietary Guidelines for Americans.
Keep exploring
Use the calculator or continue with a related guide:
Put the guide into practice
Keep a clearer drink diary.
Track units, standard drinks, cost, calories, dry days and estimated BAC on iPhone and Apple Watch.
