Alcohol Unit / Standard Drink Counter implementation

Binding contract

This record describes what an executable surface must bind and validate. It does not claim that a public calculator, package, or production route is deployed.

Record owner

Guth Instruments

Lifecycle

verified-clean

Evidence ID

t5-057

Effect

Computation or source lookup only

Input and validation requirements

The extreme-magnitude vector produces Infinity through JavaScript floating-point overflow, and the US branch is not uniquely computable from the supplied formula without an ethanol-density assumption. ABV notation also permits a factor-100 convention error unless the input representation is explicit.

Required corrections

No binding erratum is attached to this unique-name record. Implementers must still preserve the declared units, domain, and failure behavior.

Inspectable interface fixture

The sample below is evidence for interface and validation tests, not a production implementation.

{
  "inputs": {
    "volume_ml": 500,
    "abv_percent": 5,
    "unit_system": "UK and US"
  },
  "expected_outputs": {
    "uk_units": 2.5,
    "us_standard_drinks": 1.4089285714,
    "pure_alcohol_ml": 25,
    "pure_alcohol_g": 19.725
  },
  "working": "Pure alcohol = 500 × 5 ÷ 100 = 25 mL. UK units = 25 ÷ 1000 = 2.5. Pure alcohol mass = 25 × 0.789 = 19.725 g. US standard drinks = 19.725 ÷ 14 = 1.4089285714."
}

Other records

Sources and evidence

These pointers bind the page to evidence. They do not grant authority or collapse verification into deployment.

• VERIFIED_LEDGER.json
• evidence-tranche5/tranche5-results.json