Australia BAC Estimator

Blood Alcohol Content Calculator with Gastric Surgery Adjustments

⚠️ IMPORTANT DISCLAIMERS

This is an ESTIMATE only. Individual responses to alcohol vary significantly, and these calculations cannot determine your actual fitness to drive or operate machinery.

Everyone processes alcohol differently. Factors including metabolism, genetics, medications, food intake, hydration, sleep, stress, and health conditions all affect how your body handles alcohol.

For gastric surgery patients: Bariatric procedures dramatically alter alcohol absorption and metabolism. Published data shows enormous individual variation. These estimates are intentionally conservative but may still underestimate your actual BAC.

Legal Limits in Australia

Full licence holders: 0.05% BAC

Learner, P1, P2 licence holders: 0.00% BAC (zero tolerance)

Professional drivers (trucks, taxis, etc): 0.00% BAC

Remember: penalties for drink driving include heavy fines, licence suspension, and potential imprisonment. More importantly, you risk lives.

Standard calculation: No surgical adjustments applied. Uses baseline peak factor (k=1.0) and elimination rate (β=0.015 BAC/h).

Enter the quantity for each type of drink you consumed. One Australian standard drink = 10g of alcohol.

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Enter the date and time when you had your first drink
Enter the date and time when you had your last drink
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Estimated BAC

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