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Ultimate BAC Calculator

The terms On-line BAC Calculator or On-line BrAC Calculator have become synonymous. Technically, a BrAC Calculator estimates Breath Alcohol Content or Concentration while a BAC Calculator estimates Blood Alcohol Content. Since Breath Alcohol Content (BrAC) is generally accepted to be proportional to the amount of alcohol present in the blood (BAC), drink calculators use these terms interchangeably. BAC calculators are also widely available for smart phones. We also offer a free advanced Iphone BAC calculator called DrunkGuard available from the Itunes store.

Other common names for drink calculators include Drink Wheel (from the days when BAC estimates were done using printed cardboard wheels), DUI Calculator, Drunk Calculator and even on-line breathalyzer.

Ultimate BAC Calculator

Select your language:

I am:
Male Female

My weight is:

I've been drinking for:

Unit of Measure:

Your Breath Alcohol Content is:



Effects from Alcohol at this level include:


Limits of Use for Alcohol Calculators - Education First

Most drink calculators estimate the percentage of alcohol in the blood based on body weight, sex, and the amount of alcohol consumed over time. These are important factors in estimating BAC but they are by no means the only variables. Intoxication depends on additional factors including personal health, hydration, medications, body type and recent food consumption to name a few.

Unlike the old fashioned Drink Wheel, Lifeloc’s updated online BrAC Calculator works if you switch between drinks of different alcohol concentrations during the course of an evening.

The Lifeloc Ultimate Blood Alcohol Content Calculator is provided for educational purposes only. It’s not legal advice. Do not rely on these results to determine fitness to drive or work. If you drink, please don’t drive.

International Usage

Other units of measure are used internationally. Promille (‰) which the Lifeloc Ultimate BAC calculator provides is widely used in Europe. The alcohol level at which a person is considered to be legally impaired varies by country.

Add the BAC Calculator to Your Website

Use the embed code below to add the Ultimate Blood Alcohol Content Calculator to your site.

<iframe src="http://www.lifeloc.com/calculator-widget.html" width="800" height="750" scrolling="no" frameborder="0"> <p>Your browser does not support iframes.</p> </iframe>