Widmark estimate · VN fines

🍺 Blood Alcohol Estimator

Pick what you drank, your weight and the hours since the first sip — get an estimated blood alcohol level (Widmark formula), how long until it clears, and where Vietnam's zero-tolerance driving fines would land.

⚠️ Rough biological ESTIMATE — real BAC varies hugely with food, genetics and health. NEVER use this to decide whether to drive. In Vietnam the legal limit when driving is ZERO.

Weight (kg)

Hours since first drink1h

05080150+

VN driving fines (Decree 168/2024, reference)

Widmark: BAC = alcohol grams ÷ (weight × r) − elimination×hours, r ≈ 0.68 (male) / 0.55 (female), elimination ≈ 0.15‰/h. 100 mg/100 mL = 1‰. Alcohol leaves at a FIXED rate — coffee, showers or “sweating it out” do not speed it up; only time does.