The fields with the red border are required.

IBU Calculator
Pre-Boil Size:
gallons
Final Batch Volume:
gallons
Units:
Original Gravity:
(eg: 1.xxx)
Estimated Boil Gravity:
    Ounces   Alpha Acid %   Boil Time   Type              
1
2
Total IBUs:
3
Tenseth:
Garetz:
4
Rager:
Daniels:
5
Average IBUs:
6
Requird for Garetz Formula
Target IBU:
(Average Formula IBU)
Elevation: (US Average Elevation)