Estimate your blood alcohol content based on drinks consumed, body weight, and time elapsed. This is an estimate only — never rely on it to determine fitness to drive.
Estimate your blood alcohol content based on drinks consumed, body weight, and time elapsed. This is an estimate only — never rely on it to determine fitness to drive.
BAC = (Alcohol g) / (Body Water) × 100 – 0.015 × Hours
3 drinks, 80 kg male, 2 hours → BAC ≈ 0.047%.
Enter your values in the fields above and click "Calculate" to get instant results. All calculations happen in your browser — nothing is sent to any server.
What is Blood Alcohol Content Calculator?
Estimate your blood alcohol content based on drinks consumed, body weight, and time elapsed. This is an estimate only — never rely on it to determine fitness to drive.
What formula does this use?
This calculator uses: BAC = (Alcohol g) / (Body Water) × 100 – 0.015 × Hours
Is this calculator free?
Yes! All calculators on CalcNest AI are 100% free with no account required.
Is my data safe?
Absolutely. All calculations run locally in your browser. We never store or transmit your input data.