Blood Alcohol Calculator
Estimate your blood alcohol concentration (BAC) based on drinks consumed. This is for educational purposes only - never rely on estimates when deciding to drive.
Important Warning
This calculator provides estimates only. Actual BAC depends on many factors including metabolism, food intake, medications, and individual differences. Never drink and drive. If you've been drinking, use a taxi, rideshare, designated driver, or wait until completely sober.
Your Details
Drinks Consumed
375ml @ 3.5%
375ml @ 5%
150ml @ 13%
30ml @ 40%
Estimated BAC
Standard Drinks
4.5
Estimated BAC
0.065%
Status
Over Limit
Hours Until 0.05
1.5 hrs
Australian Drink Driving Limits
| Driver Type | BAC Limit | Notes |
|---|---|---|
| Full Licence Holders | Under 0.05% | Standard limit for most drivers |
| Learner Drivers | 0.00% | Zero tolerance - no alcohol |
| P1/P2 Provisional | 0.00% | Zero tolerance - no alcohol |
| Professional Drivers | 0.02% or 0.00% | Taxi, bus, truck drivers - varies by state |
What is a Standard Drink?
- - 285ml full-strength beer (pot/middy)
- - 375ml mid-strength beer (stubbie)
- - 100ml wine (less than a standard pour)
- - 30ml spirits (one nip)
- - 1 standard drink = 10g pure alcohol
Factors Affecting BAC
- - Body weight and composition
- - Food in stomach
- - Speed of drinking
- - Medications
- - Liver health and metabolism
Drink Driving Penalties
Penalties vary by state and BAC level. Common consequences include:
- - Immediate licence suspension (0.05-0.079%)
- - Fines from $500 to $5,000+
- - Disqualification periods (3 months to years)
- - Interlock device requirements
- - Criminal record and imprisonment for high-range