Blood Alcohol Content (BAC)

Around the world, BAC is recognized as the standard tool for setting a legal limit for intoxication while driving. Although the math behind determining BAC differs in some countries, the numeric result is the same. Blood may be thicker than water, but its mass is about the same. A gallon of water and a gallon of blood weigh about the same. If you have .05 grams of alcohol in 100mL blood, it is the same as saying .05% of your blood is alcohol. In other words, a BAC of 05 in America is the same as a BAC of .05 in Great Britain. What matters to you is how the law treats all of this when you drive.