Brewery ABV & BAC Calculator
Calculate alcohol by volume (ABV) from gravity readings, or estimate Blood Alcohol Concentration (BAC) and sobriety timelines.
This BAC-focused page estimates blood alcohol concentration, impairment ranges, and time-to-sobriety from body weight, standard drinks, and elapsed time. It is educational only and must not be used to decide whether driving is safe.
Safety disclaimer: BAC uses a simplified Widmark estimate with 14g standard drinks and a 0.015% per-hour elimination assumption. It cannot determine legal impairment, driving safety, or medical risk.
Alcohol Assessment Profile
Frequently Asked Questions
What is a standard drink?
In the United States, a standard drink contains about 14 grams of pure alcohol. This is roughly equivalent to 12 ounces of 5% beer, 5 ounces of 12% wine, or 1.5 ounces of 40% spirits.
How does the body eliminate alcohol?
The liver metabolizes about 90% of consumed alcohol, with the rest excreted through breath, sweat, and urine. The average elimination rate is approximately 0.015% BAC per hour.
What is attenuation in brewing?
Apparent attenuation represents the percentage of sugars converted into alcohol and carbon dioxide by yeast during fermentation. Higher attenuation yields a drier finish.