by Joe Gerteis
Saint Paul Homebrewers Club
September 7, 2010

When you first start using a brewing software package, one of the first things the software asks you to do is to pick a formula for hop calculations. The common ones are Rager, Garetz, Tinseth, and Daniels. You may have heard people say that hop calculations are estimates only, and what really matters is consistency rather than absolute accuracy. In other words, what they are saying is pick one that works for you and stick with it. That’s true and it’s good advice. The problem is that brewers are often then forced to pick before they really know what’s involved in the choice. The simple practical advice is this: pick Tinseth and stick with it. But if you care about what’s going on and why, here’s the deal.
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