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Hop Bitterness Calculator
Adapted from the Bitterness Calculator by Glenn Tinseth, publisher of The Hop Page.

Change any value below and click Calculate (or hit the TAB key) and the BUs 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 have been developed by Glenn Tinseth, 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). Have fun with this and don't forget to let him know what you think of it (gtinseth@realbeer.com) and be sure to visit The Hops Page.

Wort Specific Gravity (during the boil) Final Volume
US Barrels Hectoliters

Hop Addition Alpha Acid % Mass Added
lbkg
Time Boiled (min) Utilization % Bittering Units
First
Second
Third
Fourth
Fifth
Copyright © 1997 by Glenn Tinseth
All Rights Reserved
Total Bittering Units
Calculate
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