Updated October 2026
Guinness is a stout, and its flagship, Guinness Draught, is a nitrogenated Irish dry stout brewed at St. James’s Gate in Dublin. In the US, Guinness Draught is 4.2% ABV with 125 calories per 12 fl oz. Its near-black color and coffee-like flavor come from roasted barley, and its creamy head comes from nitrogen, released in cans by the famous widget. Guinness also makes stronger stouts, including Guinness Extra Stout at 5.6% ABV.
What makes Guinness a stout
A stout is a dark, top-fermented beer, part of the ale family, built on heavily roasted grain. Guinness Draught belongs to the Irish dry stout style. US retailer listings describe a recipe that pairs roasted unmalted barley with malted barley; the roasted barley supplies the dark color and the dry, coffee-forward character, rather than the sweetness found in milk stouts or many imperial stouts.
Federal labeling rules recognize stout as a traditional beer designation. Under 27 CFR § 7.141, the TTB lists beer, ale, porter, stout, lager, and malt liquor as the baseline fermented beverage designations against which specialty malt beverages are measured. So the word “stout” on a Guinness label is a recognized style name, not a marketing invention. For a side-by-side look at how stouts differ from the world’s most common beer style, read our stout vs lager guide.
Guinness Draught: the nitro pint
Guinness says it developed Guinness Draught in 1959 to celebrate Arthur Guinness signing his 9,000-year lease, and credits “a skillful pairing of nitrogen gas and carbon dioxide” for its smooth, velvety texture. Most beers rely on carbon dioxide alone, which forms large, sharp bubbles. Nitrogen forms much smaller bubbles, which gives Guinness its tight, creamy head and the cascading surge when it settles.
The can version recreates that effect with a widget. As the US retail listing explains, the round plastic widget in every can releases nitrogen through the beer when you open it, producing the same creamy head as a pub pour.
US retailer tasting notes describe roasted coffee and cocoa on the nose, dark chocolate and espresso on the palate with moderate hop bitterness, and a dry, clean finish. Our full guide to what Guinness tastes like goes deeper, and what malt tastes like explains where those roasted flavors come from.
Other Guinness beers sold in the US
- Guinness Draught: the nitro stout, 4.2% ABV in the US, 125 calories per 12 fl oz.
- Guinness Extra Stout: a stronger stout at 5.6% ABV. US listings describe it as a medium-bodied stout with a robust roasted character and aromas of coffee, toffee, and caramel, based on older recipes kept in the Guinness Archive.
- Other releases: Guinness also sells stronger export-style stouts and occasional limited beers. Strength varies by product and market, so check the label of the bottle or can in front of you.
Alcohol content on beer labels has a legal tolerance. Under 27 CFR § 7.65, the stated alcohol content of a malt beverage at 0.5% ABV or more may vary from the actual content by up to 0.3 percentage points. That is one reason the same beer can show slightly different figures in different markets; in the UK, for example, Guinness Draught cans are labeled at 4.1%.
Is Guinness a heavy beer?
Despite its dark color, Guinness Draught is relatively light. At 4.2% ABV and 125 calories per 12 fl oz, it carries less alcohol than many mainstream lagers at 5%. The creamy texture comes from nitrogen, not from extra sugar or alcohol. A 12 fl oz serving at 4.2% contains about 0.84 US standard drinks, since a standard drink equals 12 fl oz of 5% beer, according to the National Institute on Alcohol Abuse and Alcoholism. A 14.9 fl oz can holds about 1.04 standard drinks. Our guide to how much beer affects you covers the factors that change how alcohol hits you.
How to serve Guinness
- Glass: a tulip pint glass shows off the surge and settle.
- Temperature: serve it chilled but not ice cold, so the roasted flavors come through.
- Pour: pour cans firmly into the glass so the nitrogen forms a full head, then let it settle.
- Layered drinks: Guinness floats on lighter beers in a Black and Tan; see our guide to the best beer for a Black and Tan. For a nonalcoholic contrast in flavor, compare what ginger beer tastes like.
Frequently asked questions
Is Guinness an ale or a lager?
Guinness Draught is a stout, which is a type of ale. It is not a lager.
What is the alcohol content of Guinness?
Guinness Draught is 4.2% ABV in the US. Guinness Extra Stout is 5.6% ABV.
Why is Guinness so creamy?
Guinness Draught is dispensed with a mix of nitrogen and carbon dioxide. Nitrogen forms tiny bubbles that create a dense, creamy head, and cans use a widget to release nitrogen when opened.
Is Guinness a porter or a stout?
Guinness labels its beers as stouts. Porter and stout are related dark styles, and both appear among the traditional designations in 27 CFR § 7.141.
Sources
- The Liquor Barn, Guinness Draught 8 pack cans product listing (ABV, style, widget, tasting notes).
- Food Lion, Guinness Draught Stout 4 pack product listing (calories, widget description).
- Walgreens via Uber Eats, Guinness Extra Stout product listing (ABV, description).
- The Full Pint, Reviewed: Guinness Draught (Guinness origin and nitrogen description quoted).
- Tesco, Guinness Draught can listing (UK label strength).
- Electronic Code of Federal Regulations, 27 CFR § 7.65 (Alcohol content) and § 7.141 (Class and type), via Cornell Legal Information Institute.
- National Institute on Alcohol Abuse and Alcoholism, What Is a Standard Drink? (niaaa.nih.gov).
More in our Beer Guide.