Profile Reference
- Drink type
- Beer
- Subtype
- Regular
- Database profile ID
- 519
- Status
- Public active profile
DUI Professional Drink Profile
Guinness Black Lager
A public drink database profile for BAC simulation, drinking-pattern analysis, and litigation-support workflow review.
Updated May 31, 2026
Alcohol concentration
4.50%
percent alcohol by volume
Reference volume
12.00 oz
fluid ounces per full profile serving
Ethanol volume
0.54 oz
volume x ABV before density conversion
US standard drinks
0.90
using 0.6 fl oz ethanol per standard drink
BAC Simulation Context
DUI Professional uses drink profiles as structured inputs for alcohol dose, absorption timing, and elimination modeling. This profile describes the concentration and reference serving volume used when a full drink is added to a simulation.
12.00 oz at 4.50% equals about 0.90 U.S. standard drinks because one U.S. standard drink contains 0.6 fl oz ethanol. Review how these values are used in BAC simulation software or compare it against the full drink database.
Manufacturer Information
- Manufacturer
- Guinness Brewery
- Parent company
- Diageo
- Category
- Stout beer brand family
- Origin
- Ireland
- Production location
- St. James's Gate, Dublin, Ireland
- Source-backed ABV
- 4.50%
Loading manufacturer location globe
Guinness Black Lager Background
Guinness is an Irish stout brand rooted at St. James's Gate in Dublin, where official Diageo brand material traces the business to Arthur Guinness and a 9,000-year brewery lease. Guinness later became closely associated with nitrogenated stout, a technique the brand dates to 1959. DUI Professional uses Guinness records as beverage-reference inputs for BAC simulation, alcohol dose documentation, and forensic drinking-pattern review.
Professional Use
- Compare drink assumptions during DUI and criminal-defense case review.
- Document beverage concentration and volume used in BAC simulation reports.
- Review drinking-pattern inputs with forensic toxicology and expert-witness workflows.
- Support training examples for alcohol absorption, elimination, and retrograde extrapolation.
Standard Drink Math
A U.S. standard drink uses 0.6 fl oz of pure ethanol. This profile's 12.00 oz reference serving at 4.50% ABV contains 0.54 oz ethanol, equal to 0.90 standard drinks.
That ethanol dose is the starting point for BAC simulation software; consumed fraction, timing, absorption, elimination, and body-composition assumptions are modeled separately. Compare other entries in the drink database or use the related profiles below.
