Calculate your estimated Blood Alcohol Concentration (BAC) based on drinks consumed, body weight, gender, and time elapsed. Understand impairment levels and time to sobriety.
Blood Alcohol
0.038%
Mild
Legal but impaired (under 0.08)
This is an estimate only. Actual BAC varies. Never drink and drive.
Blood Alcohol
0.038%
Mild
Legal but impaired (under 0.08)
This is an estimate only. Actual BAC varies. Never drink and drive.
Women typically have higher BAC due to body composition differences.
One standard drink contains approximately 0.6 oz (14g) of pure alcohol:
Beer
12 oz
5% ABV
Wine
5 oz
12% ABV
Liquor
1.5 oz
40% ABV
Malt Liquor
8 oz
7% ABV
Explore how changes affect your results
Compared to the general population
Your BAC
3.8 % × 100
Percentile
40th
Below average - looking good!
Distribution
Sober
0.0
Social
2.0
Impaired
5.0
Legal Limit
8.0
Dangerous
15.0
Your Ranking
Top 40%
60% are higher
Based on your BAC results
At 0.038% BAC, you have some alcohol in your system. Effects are minimal but present.
Your body processes alcohol at about 0.015% per hour. You'll need approximately 2.5 hours to be fully sober.
Drink water between alcoholic drinks. This doesn't reduce BAC but helps prevent dehydration and may reduce hangover symptoms.
BAC (Blood Alcohol Content) is estimated using the Widmark formula: BAC = (Alcohol consumed in grams / (Body weight × r)) - (Time × 0.015), where r is 0.68 for men, 0.55 for women. The legal limit for driving in most US states is 0.08%. This calculator provides estimates only - actual BAC varies by many factors. Calculate at practicalwebtools.com.
BAC measures the percentage of alcohol in your bloodstream. A BAC of 0.08% means 0.08 grams of alcohol per 100 milliliters of blood. This is the legal limit for driving in most US states.
This calculator uses the Widmark formula, which provides estimates based on average alcohol metabolism. Actual BAC varies based on food intake, medications, liver health, and individual metabolism. This is for educational purposes only.
The body metabolizes alcohol at about 0.015% BAC per hour (roughly one standard drink). A person with 0.08% BAC would take about 5-6 hours to become sober. Sleep, coffee, and cold showers do NOT speed up this process.
Key factors include: body weight (higher weight = lower BAC), gender (women typically have higher BAC per drink), food intake (food slows absorption), drinking speed, and individual metabolism.
Even below 0.08%, alcohol impairs judgment, reaction time, and coordination. Some states have lower limits (0.05%), and commercial drivers often have 0.04% limits. When in doubt, don't drive.
Blood Alcohol
0.038%
Mild
Legal but impaired (under 0.08)
This is an estimate only. Actual BAC varies. Never drink and drive.