Hop Calculator
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Wort Specific Gravity (during the boil) Final Volume (gal)
Hop Addition Alpha Acid Percentage Mass Added (oz) Time Boiled (minutes) Utilization Percentage Bittering Units
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Second
Third
Fourth
Fifth

Copyright © 1997 by Glenn Tinseth
All Rights Reserved

Total Bittering Units
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This is the Javascript version of the Bitterness Calculator. All you have to do is change any value and click Calculate and the IBUs will be calculated. If you want to make multiple additions, simply fill in another line's Alpha Acid Percentage, Mass Added, and Time Boiled fields. The Utilization Percentage, Bittering Units, and Total Bittering Units fields are calculated for you; any entries you make to those fields are ignored.

The Bitterness Calculator takes into account both the time of boil and the wort gravity during the boil. The numbers are my own, based partly on data and partly on experience. Your experience and brewing practices may be different than mine so here's the official disclaimer: Your Mileage May Vary (YMMV).

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The Old West Team would like to thank Glenn Tinseth for allowing us to use this chart. You can contact Glenn at  gtinseth@realbeer.com

 

 

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