Blood Alcohol Calculator

Estimate your blood alcohol content (BAC) for educational purposes. This tool does not determine legal impairment or fitness to drive.

⚠️ Important: This is for educational purposes only. Never drink and drive. Only you can determine your fitness to drive or operate machinery.

BAC Calculation

Gender

Male Female

Age

Body Weight

Drinks Consumed

Type

Quantity

Time Ago (hrs)

Additional Factors

Drinking on empty stomach Taking medications Fatigued or sleep-deprived

BAC Results

0.05%

Estimated BAC

Mild Impairment

Impairment Level

3.2 hrs

Until Sober

Above Legal Limit 🚫

Most jurisdictions: 0.08% (driving), 0.04% (commercial)

Expected Effects at This BAC

Relaxation and mild euphoria

Decreased inhibitions

Impaired judgment and coordination

BAC Timeline

Current: 0.05%

In 1 hour: 0.035%

In 2 hours: 0.02%

Sober (0.00%): 3.2 hours

Understanding Blood Alcohol Content

How BAC Works

BAC measures the percentage of alcohol in your bloodstream. It's affected by body weight, gender, food consumption, and the rate of alcohol metabolism. Everyone processes alcohol at different rates.

Calculation Limitations

This calculator provides estimates only. Actual BAC varies based on many factors including genetics, liver function, medications, and individual differences. Only breathalyzer or blood tests provide accurate measurements.

Legal Implications

Legal limits vary by location and situation. Most places set 0.08% for driving, 0.04% for commercial drivers, and 0.00% for drivers under 21. Even below legal limits, you may still be impaired and liable for accidents.

Safety First

The only safe approach is not to drink and drive. Use designated drivers, rideshare services, or public transportation. Your life and the lives of others depend on making responsible choices.