How It Works
This calculator uses the Widmark Formula, the gold standard for estimating Blood Alcohol Content.
It calculates the grams of alcohol in your specific drinks (based on volume and ABV), divides it by your body water constant (affected by gender/weight), and accounts for metabolic burn-off over time.
International Laws
Driving limits vary wildly. While the US and UK allow 0.08%, many countries are stricter:
- 0.08% (Lenient): USA, UK, Canada, Mexico, Singapore.
- 0.05% (Standard): Australia, France, Germany, Italy, Spain, South Korea.
- 0.02-0.03% (Strict): India, Japan, China, Russia, Sweden, Norway.
- 0.00% (Zero Tolerance): Brazil, UAE, Czech Republic, Hungary, Pakistan.
Driving FAQs
How many beers is 0.08%?
There is no single answer. For a 160lb man, ~3 beers might hit 0.08%. For a 120lb woman, 2 beers could exceed it. Always err on the side of caution.
How fast do I sober up?
The average liver processes alcohol at a rate of 0.015% per hour. Coffee, showers, and water do NOT speed this up. Only time works.
Tools & Data Verified by the EverydayCalculators Medical Research Team.
Last updated: December 2026.