Reference scale, not a limit on official guideline values.
Bitterness · IBU
17–27
0306090120+
Measured bitterness; perceived bitterness is described in the guideline below.
Brewers Association 2026 · Printed guideline page 40 · PDF page 49. Color graphics are illustrative.
The guideline, in detail
Official style attributes, including what may be present and what should be absent.
Malt aroma & flavor
Pronounced aromas and flavors of toasted malted barley. Some caramel and toffee character can contribute to complexity in a secondary role. Dark fruit flavors such as prune and raisin may be present. Malty sweetness is pronounced but should not be cloying. There should be no astringency from roasted malts.
Hop aroma & flavor
Hop aroma is absent. Hop flavor is low.
Perceived bitterness
Low
Body & mouthfeel
Full
Clarity
Appearance should be clear. Chill haze should not be present
Color
Copper to dark brown
Fermentation characteristics
Alcoholic strength is high. Fruity esters are commonly perceived at low to moderate levels. Diacetyl should not be present.
Technical specifications, including gravity
Original Gravity (°Plato) 1.074-1.080 (18-19.3 °Plato) • Apparent Extract/Final Gravity (°Plato) 1.014- 1.020 (3.6-5.1 °Plato) • Alcohol by Weight (Volume) 5.2%-6.2% (6.6%-7.9%) • Hop Bitterness (IBU) 17-27 • Color SRM (EBC) 12-30 (24-60 EBC)
Keep exploring
Other styles in this guideline group. Similar placement doesn’t guarantee a similar flavor.