Summary
The buttons on the left provide calculators for various beer-related computations. The list includes:
- an IBU calculator using the Tinseth formula
- an IBU calculator using the Rager formula
- an IBU calculator using the Garetz formula
- an IBU calculator for the mIBU method described on my blog
- an IBU calculator for the SMPH method described on my blog
- a page for estimating the hop freshness factor (or alpha-acid decay over time) and hop storage index (HSI)
- a calculator for the relationship between specific gravity, volume, and time
- a calculator for correcting specific gravity, pH, and volume based on temperature (and a gravity ↔ °Plato converter)
- a calculator for estimating the rate of post-boil natural cooling and the rate of evaporation as a function of temperature
- a calculator for estimating the amount of calcium sulfate and calcium chloride to add to mash or brewing water)
- a calculator for estimating dry-yeast pitching rates and alcohol content (ABV)
- a tutorial on perceptual difference testing using interactive worksheets
- a web page for searching for optimal parameter values for the SMPH model, and for evaluating the SMPH model on development or test data
The source code (HTML, CSS, and JavaScript) for these calculators can
be seen by clicking on the "source code" link above. Of note,
the file js/trainingData.js provides the specific conditions
used in brewing the 347 beers with measured IBU values (and assumed
conditions for four beers reported by Val Peacock in "The International
Bitterness Unit, Its Creation, and What it Measures" in Hop Flavor
and Aroma) that were used to find parameter values for the SMPH model.
The file js/developmentData.js provides the specific
conditions used in brewing the 13 beers with measured IBU values used
as cross-validation data to develop the SMPH model.
The file js/testData.js provides specifics on the 18 beers
used in testing the IBU models.
The "Blog: Table of Contents" link above will take you to my blog, which is all about experimenting with the process of making beer.
AlchemyOverlord home page