BAC Calculator

Estimate Blood Alcohol Content using the Widmark formula. For educational purposes only.

Drink Type

ABV % (custom)

Oz (custom)

Number of Drinks

Body Weight

Gender

Hours since first drink

Enter your details to estimate BAC

⚠ Warning: This calculator provides estimates only. Never drive under any influence of alcohol. The legal limit in most countries is 0.08% BAC. Individual factors vary significantly.