Estimate your current Blood Alcohol Concentration using the Widmark formula. Enter drinks consumed, time elapsed, your weight and sex: and get an estimated BAC, level description, time to sober, and legal limit comparison for your country.
Enter your drink details
Fill in drinks, time, weight and sex: then tap Estimate My BAC.
| BAC Range | Effects |
|---|---|
| 0.00–0.02% | Little to no effect; slight relaxation possible |
| 0.02–0.05% | Mild euphoria, reduced social inhibition, slightly altered judgment |
| 0.05–0.08% | Reduced coordination, impaired judgment, slower reaction time: driving risk elevated |
| 0.08–0.15% | Clearly drunk; significantly impaired coordination, slurred speech, poor balance |
| 0.15–0.30% | Severe impairment, confusion, nausea; alcohol poisoning risk |
| 0.30%+ | Life-threatening; loss of consciousness, breathing difficulties: call emergency services |
| Country | Limit (BAC%) | Note |
|---|---|---|
| USA (most states) | 0.08% | 0.04% for commercial drivers |
| UK & Australia | 0.05% | Scotland: 0.05%; England/Wales: 0.08% |
| Germany / France / Spain | 0.05% | 0.00% for new drivers in many EU countries |
| Sweden / Norway | 0.02% | Effectively zero tolerance |
| Russia / Ukraine | 0.00% | Strict zero tolerance |
| Japan | 0.03% | Very strict enforcement |
| Canada | 0.08% | Warning range 0.05–0.08% |