What is Blood Alcohol Concentration (BAC)?

Blood Alcohol Concentration (BAC) is a measurement of the amount of alcohol in the body. BAC is measured in grams of alcohol per 100 millilitres of blood. The legal blood alcohol concentration (BAC) limit is 0.05. This means that a driver’s body must contain less than 50 milligrams of alcohol per 100 millilitres of blood. A driver’s BAC is measured by a simple breath test procedure. Most people find it difficult to gauge their own blood alcohol level as there are so many factors that you need to consider.