The BAC Calculator is a tool which can help you assess the concentration of alcohol in your blood. The calculation is based on what kind of alcohol you drank, how much of it you consumed and how long ago. As your blood alcohol concentration depends on a variety of aspects, this sobriety calculator takes into consideration your body weight and sex as well. Have you ever considered why one person gets drunk more easily than another? Or wondered how this changes depending on the weight, sex, or type of alcohol? If so, keep reading.