The science behind every calculation.
A living brewing science library — the formulas, the reasoning, and the sources behind every number in the builder. Browse by topic from the sidebar.
Four picks to set the foundation.
Getting Started
New to the site? One guide is all it takes. It walks through what the builder calculates, what to set up first, and how to use the numbers it gives you on brew day.
Brewing Science
The math behind every number in the builder, written for brewers rather than chemists. Each article picks one number — IBU, gravity, mash pH — and covers where it comes from, when to trust it, and what to do when it looks off. The formulas are all here, with the sources they come from.
IBU & Bitterness · Gravity & ABV · Water Chemistry · Mash pH · Mash Temperature · Yeast Starters · Hop Flavor Radar · Ingredient Freshness