Calculate your blood alcohol concentration (BAC) and estimate when it is safe to drive.
BAC = (Total alcohol consumed / (Body weight × Body water ratio)) − (Hours elapsed × Elimination rate)
Body water ratio: Male 0.68, Female 0.55
Elimination rate: ~0.015% per hour (average)
Volume per cup: Soju 50 ml, Beer 355 ml, Wine 150 ml, Makgeolli 300 ml, Whiskey 30 ml, Highball 250 ml
South Korea DUI Penalties:
• 0.03% – 0.08%: License suspension + fine
• 0.08% or above: License revocation + criminal charges
• 0.2% or above: Aggravated penalties
Drink driving calculator: estimate your blood alcohol level (BAC) and when you can safely drive. Based on the Widmark formula. Free alcohol calculator.
Yes, 100% free. No signup required. All processing happens in your browser — no data is sent to any server.
Yes, all tools are fully responsive and work on smartphones, tablets, and desktops.