Blood Alcohol Content (BAC) Calculator

Estimate blood alcohol concentration based on drinks consumed, weight, gender, and time elapsed.

Free to use
12,500+ users
Updated January 2025
Instant results

Blood Alcohol Calculator

Estimate your Blood Alcohol Content (BAC)

What is a Standard Drink?

12 oz of regular beer (5% ABV)
5 oz of table wine (12% ABV)
1.5 oz of 80-proof spirits (40% ABV)

Disclaimer

This calculator provides an estimate for informational purposes only. Individual BAC levels can vary based on metabolism, health, and food intake. Do not drink and drive. This is not a legal tool.