What is BAC?

%BAC is short for Blood Alcohol Content (or Breath Alcohol Content). It is a measurement of weight per unit of volume. Understanding readings can be difficult in New Zealand as there are different methods of interpretation. In NZ we have mcg per litre of breath (mcg/L) and mcg per 100ml of blood. The international standard however is %BAC (including Australia) and we have found that this is the easier format for the majority of people to understand. For this reason Breathalysers NZ sends all models out in %BAC whether than can be changed to mcg/L or not.