BAC Analysis Tool
Estimate your Blood Alcohol Content (BAC) based on consumption and biological factors.
Input Variables
Live Analysis
What is Blood Alcohol Content?
Blood Alcohol Content (BAC) refers to the percentage of alcohol currently present in a person’s bloodstream. While most of us are familiar with the term, understanding the technical measurement is vital for safety and legal compliance.
For example, a BAC of 0.10% indicates that an individual’s blood supply contains one part alcohol for every 1,000 parts blood. Physiologically, BAC can typically be measured within 30 to 70 minutes after alcohol consumption begins.
"It is crucial to remember that everyone metabolizes alcohol differently based on age, weight, stomach contents, and biological gender. Our calculator provides a high-level estimate, not a legal measurement."
What Constitutes "One Drink"?
The definition of a standard drink varies significantly depending on the type of alcohol and its concentration. In the United States, a "standard" drink contains approximately 14 grams of pure alcohol.
12 oz Regular Beer
~5% Alcohol
5 oz Wine
~12% Alcohol
1.5 oz Distilled Spirits
~40% Alcohol (80 Proof)
Legal BAC Limits in the US
Across the United States, the standard legal BAC limit for adult drivers is 0.08 percent. Exceeding this limit will result in an immediate DUI arrest and the subsequent requirement for an SR‑22 filing. However, stricter limits apply to specific groups:
Standard Limit
0.08%
Standard limit for adult non-commercial drivers in nearly all 50 states.
Commercial (CDL)
0.04%
Strict limit for truck drivers and commercial operators while on duty.
Zero Tolerance
0.02%
Enforced for drivers under the age of 21. Even trace amounts result in arrest.
How is BAC Legally Measured?
To accurately measure BAC in a legal context, law enforcement utilizes the Breathalyzer test. This device measures the alcohol concentration in your exhaled breath and converts it into a blood percentage instantly. While calculators provide an approximation, field tests are the legal standard that determines DUI status and license reinstatement needs.
Dealing with a DUI Conviction?
If your BAC was high and you need to reinstate your license, we can help. Connect with a licensed high-risk expert who can get your SR‑22 filed today.