Credits and licences

Last updated 2026-10-11

Our own code

The tools and page layouts are written for this site. The pages make no requests to other servers.

The calculators use published constants and textbook formulas, typed into our own code (no third-party tables or libraries are copied):

Nutrition Facts and Supplement Facts formats, Daily Values and rounding rules: US Code of Federal Regulations 21 CFR 101.9 and 101.36 (public domain).
Brewing: the standard ABV formula (OG − FG) × 131.25 and its alternate form, the ASBC polynomial relating specific gravity and degrees Plato, and the Terrill refractometer correction.
Shelf life: the Q10 temperature-coefficient model and the Arrhenius equation, with the CODATA molar gas constant.
Curing: Cure #1 / Prague Powder #1 contains 6.25 % sodium nitrite; nitrite limits are the user’s to enter from the applicable rules.
Baking: baker’s percentages (every ingredient as a percentage of total flour) and the usual yeast-type conversions, shown as approximations.

None at present. If we add any library, font or data set, it will be listed here with its licence and a link (data/credits.json, rendered below).