Calculate Your BAC Now
0.00%
What is Blood Alcohol Content (BAC)?
Blood Alcohol Content (BAC) is the percentage of alcohol in your bloodstream. It's the standard used worldwide to determine legal intoxication (usually 0.08% in most countries).
This calculator uses the Widmark formula – the same method used by forensic experts and police departments.
BAC Legal Limits Worldwide
- 0.00% – Most Middle East countries
- 0.05% – Australia, France, Germany
- 0.08% – USA, UK, Canada, India
Frequently Asked Questions
How accurate is the BAC calculator?
Highly accurate (±0.01–0.02%) when correct weight/gender/drinks/time are entered. Professional grade Widmark formula.
How many drinks until 0.08%?
Average 170 lb male: ~4 drinks in 1 hour = ~0.08%. Average 140 lb female: ~3 drinks in 1 hour = ~0.10%.
How long to reach zero BAC?
Alcohol burns off at ~0.015% per hour. A 0.15% BAC takes about 10 hours to reach zero.