BAC Estimator

Blood Alcohol Calculator

Estimate your blood alcohol level based on what you've had to drink, your weight, and how long you've been drinking. Uses UK units and legal limits.

1

Your Gender

2

Your Weight

3

What Did You Drink?

4

How Long Have You Been Drinking?

hours

Disclaimer: This calculator provides a rough estimate only using the Widmark formula. It is for educational purposes only and must not be used to decide whether you are safe to drive. Actual BAC depends on many individual factors including metabolism, food intake, medication, age, and health. The only safe amount of alcohol before driving is zero. Always consult a qualified professional for advice.

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Eamonn Turley - Founder

Eamonn Turley

Founder & Insurance Content Director

With 20+ years in digital insurance publishing and featured in Entrepreneur UK, Eamonn founded MultiQuoteTime to help users compare quotes transparently. Learn more →

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