Hops Bitterness Calculator (IBUs)

Batch Variables Boil Wort Specific Gravity (SG)      
Final Boil Volume (Gal.)      
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Hop Addition Hop Type Weight
(oz.)
Time Boiled
(min.)
Alpha
Acid %*
Usage
%
Bittering
Units
First
Second
Third
Fourth
Fifth
* Alpha Acid percentages are approximations and change with each crop year.
* Adjust accordingly.
Total
IBUs
This calculator is a mashup of Glenn Tinseth's bitterness formula and hops tables from Tastybrew.com.