Calculate your estimated Blood Alcohol Content (BAC) with our accurate tool
Estimate your blood alcohol content based on your drinks, weight, gender, and time spent drinking.
Learn how different alcoholic beverages compare in terms of alcohol content.
Calculate how long it will take for your BAC to return to zero.
Our BAC calculator helps you estimate your blood alcohol concentration based on scientific formulas. Understanding your BAC is crucial for making responsible decisions about drinking and driving.
The calculator uses the Widmark formula, which considers:
In the United States, one standard drink contains about 14 grams (0.6 ounces) of pure alcohol, which is found in:
Remember that BAC calculators provide estimates only. Many factors can affect your actual BAC, including:
The only safe BAC for driving is 0.00%. Even small amounts of alcohol can impair your reaction time and judgment. Always designate a sober driver or use alternative transportation if you've been drinking.
On average, your body metabolizes alcohol at a rate of about 0.015% BAC per hour. This means:
Disclaimer: This calculator is for educational purposes only and should not be used to determine if you're safe to drive or perform other tasks requiring full mental capacity. Always err on the side of caution when consuming alcohol.