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.
How it works
- 1
Choose a recipe
Open an example brew or start your own — plant, product and brew date.
- 2
Enter targets by process
Add ingredients and measurements step by step — mash, boil, ferment — with target gravity, volume, colour and bitterness.
- 3
Calculate
Calculate forward for ingredient amounts, or backward from amounts to targets. OG, ABV, IBU, colour and efficiency update instantly.
- 4
Verify & print
Check the recipe against its specification, then preview and print the operating standard for the brewhouse.
The three tools
Open Formulation
Derivation engine
Specification
Enter any two analyses and derive the rest: RDF, real/apparent extract, ABV, calories, ash, protein, carbohydrate and color (SRM ⇄ EBC).
Formula vs spec diff
Compare
Diff a formula against its specification across the mapping rules to see where the recipe drifts from the target standard.