Bittering Units : Real Extract (BU:RE) Calculator
Some people have requested that I post a calculator for the BU:RE ratio. This uses degrees Plato instead of Specific Gravity. If you don’t work in degrees Plato and don’t know how to convert from Specific Gravity, here’s a quick formula you’ll need to know:
degrees Plato = Specific Gravity / 4
To briefly describe what BU:RE does you, it is roughly a 10 point scale that helps estimate beer balance (with 5 being balanced, 10 being very bitter, and 1 being very sweet). It takes into account the bitterness of a beer (in IBUs) as well as Real Extract (in degrees Plato, which is calculated for you via the Original Gravity and Final Gravity inputs). While it can’t account for X factors like roasted malts and water composition, it goes a long way toward quantifying balance and is my current favorite method for calculating it.
BU:RE = IBU / ((0.1808 * OG °P) + (0.8192 * FG °P))
If you’d like to compare your beer against a style, here’s a large spreadsheet with all the BJCP style data you’ll need (including a column for the average BU:RE of the style). Beer Style Data (Google Docs)