IBU รจ lโacronimo di International Bitterness Unit, la scala internazionale impiegata per misurare lโamaro di una birra.
Lโamarezza della birra deriva in primis dalla luppolatura, dall’impiego di spezie a dal malto, piรน o meno tosato. La maltatura tende ad abbassare l’amarezza, per cui, se una birra รจ molto maltata sarร difficile percepire l’amarezza e prevarrร una sensazione di dolcezza.
Ogni stile di birra ha una sua posizione nella scala IBU, misurata da 0 a 120 punti. Per esempio la Weiss vanno da 8 a 15, la birra bianca va da 8 a 20, una Irish Stout da 25 a 45, un American IPA puรฒ anche arrivare a 70.
3-8ย ย ย Berliner Weisse
0-10ย ย Lambic
0-10ย ย Gueuze
0-10ย ย Fruit Lambic
8-12ย ย American Light Lager
8-15ย ย Weissbier
8-18ย ย American Lager
10-18ย ย Dunkles Weissbier
8-20ย ย International Dark Lager
8-20ย ย Witbier
10-20ย Scottish Light
10-20ย Scottish Heavy
15-20ย Cream Ale
16-22ย Munich Helles
18-24ย Mรคrzen
10-25ย Flanders Red Ale
10-25ย Dark Mild
15-25ย Belgian Dubbel
18-25ย International Amber Lager
18-25ย International Pale Lager
18-25ย Festbier
20-25ย Oud Bruin
16-26ย Doppelbock
20-27ย Dunkles Bock
15-28ย German Leichtbier
15-28ย Blonde Ale
18-28ย Munich Dunkel
18-28ย Irish Red Ale
18-28ย Biรจre de Garde
15-30ย American Wheat Beer
15-30ย Weizenbock
15-30ย Scottish Export
15-30ย Belgian Blond Ale
18-30ย Kรถlsch
18-30ย Vienna Lager
20-30 Belgian Pale Ale
20-30 German Helles Exportbier
20-30 Rauchbier
20-30 Schwarzbier
20-30 British Brown Ale
20-30 American Brown Ale
18-34ย Czech Dark Lager
17-35ย Wee Heavy
18-35ย English Porter
20-35ย Saison
20-35ย Czech Pale Lager
20-35ย Czech Amber Lager
20-35ย Pale Kellerbier
20-35ย Australian Sparkling Ale
20-35ย Belgian Dark Strong Ale
22-35ย Belgian Golden Strong Ale
23-35ย Helles Bock
25-35ย Ordinary Bitter
20-40ย Belgian Tripel
20-40ย Baltic Porter
20-40ย Sweet Stout
22-40ย German Pils
25-40ย American Amber Ale
25-40ย Amber Kellerbier
25-40ย Oatmeal Stout
25-40ย Best Bitter
20-45ย English Golden Ale
25-45ย Irish Stout
25-45ย Trappist Single
30-45ย Czech Premium Pale Lager
30-45ย California Common
25-50ย Altbier
25-50ย American Porter
30-50ย Tropical Stout
30-50ย Strong Bitter
30-50ย American Pale Ale
35-50ย Irish Extra Stout
30-60ย British Strong Ale
30-60ย Wheatwine
30-60ย Old Ale
40-60ย English IPA
35-70ย English Barleywine
40-70ย White IPA
40-70ย Red IPA
40-70ย Brown IPA
40-70ย American IPA
50-70ย Foreign Extra Stout
35-75ย American Stout
50-75ย Rye IPA
50-90 Black IPA
50-90 Russian Imperial Stout
50-100 American Barleywine
50-100 Belgian IPA
50-100 American Strong Ale
60-120 Double IPA