BAC Alcohol Calculator
Estimate Blood Alcohol Content & Sober TimeEstimated BAC & Impairment
Estimated Blood Alcohol Level
0.045% BAC
⚠️ Impairment Level: Mild Euphoria
Legal Driving Limit (≤0.08%):Under Limit (Legal)
Time to 0.05% (EU/AU limit):0.0 Hours
Time Until Fully Sober (0.00%):3.0 Hours
Pure Alcohol Consumed:42.0 grams (3 drinks)
For informational reference only. Never drink and drive regardless of calculated estimates.
Frequently Asked Questions
BAC = [Alcohol in grams / (Body weight in grams × r)] × 100 − (β × Time in hours).Where
r is gender distribution ratio (0.68 for men, 0.55 for women) and β is the average metabolic elimination rate (approx 0.015% BAC per hour).
• United States / Canada / UK: 0.08% BAC (Utah is 0.05%).
• Australia / European Union: 0.05% BAC (some countries have 0.00% zero-tolerance for novice drivers).
• Australia / European Union: 0.05% BAC (some countries have 0.00% zero-tolerance for novice drivers).