IBU Calculator
Estimate the International Bitterness Units (IBU) of your beer using the Tinseth formula. Add multiple hop additions to calculate total bitterness.
Batch Parameters
Hop Additions
Addition #1
Results
Estimated Total IBU
19.0
Tinseth Method
IBU by Style
Light Lager5–15
Wheat Beer8–18
Blonde Ale15–28
English Bitter20–35
American Pale Ale30–50
Porter18–35
Irish Stout25–45
American IPA40–70
Double IPA60–100
Imperial Stout50–90
Barleywine40–100
About IBU
IBU (International Bitterness Units) measures the bitterness from hops. Higher IBU = more bitter, but perceived bitterness also depends on malt sweetness.
Alpha Acid % indicates a hop's bittering potential. Check your hop package — it varies by lot.
Boil Time determines utilization — longer boils extract more bitterness. Late additions (5-15 min) add flavor and aroma with less bitterness.
The Tinseth formula is the most widely used IBU estimation method in homebrewing.