Recipe → OPSTD engine
Formulation
Build a recipe from plant, product and brew date. Enter parameter lines by process step, then calculate forward or backward to derive OG, color, IBU, RDF and brewhouse efficiency — with a printable OPSTD.
Pro-tier brewing engine
The pro-tier brewing
formulation engine
Formulate recipes, derive full specifications, and compare the two — all in the browser, computed from base units so the numbers hold at any scale. Loaded with a library of example recipes so you can explore a working brew on the first click.
Open Formulation
Ch.4 derivation engine
Specification
Enter any two analyses and derive the rest: RDF, real/apparent extract, ABV, calories, ash, protein, carbohydrate and color (SRM ⇄ EBC).
13 CompareFormSpec rules
Compare
Diff a formula against its specification across 13 mapping rules to see where the recipe drifts from the target standard.