Blood Alcohol Content (BAC) Calculator

The BAC calculator gives only estimates of blood alcohol concentration and doesn't take into account all the factors that affect BAC. So you shouldn't rely on these estimates. If you’ve been drinking, let someone else drive.

 
One drink = 1.5 ounces of hard liquor, 12 ounces of beer, or five ounces of wine.
Blue = Impaired driver.
Red = BAC of .08% or greater a DUI/DWI in the state of NC.

Blood Alcohol Content Chart

The BAC values in the chart below are only estimates. You shouldn't rely on the accuracy of these estimates. The chart doesn't account for all the factors that can affect BAC levels. If you’ve been drinking, it’s always best to let someone else drive.

Weight Number of Drinks
1 2 3 4 5 6 7 8 9
100 0.032 0.065 0.097 0.129 0.162 0.194 0.226 0.258 0.291
120 0.027 0.054 0.081 0.108 0.135 0.161 0.188 0.215 0.242
140 0.023 0.046 0.069 0.092 0.115 0.138 0.161 0.184 0.207
160 0.020 0.040 0.060 0.080 0.101 0.121 0.141 0.161 0.181
180 0.018 0.036 0.054 0.072 0.090 0.108 0.126 0.144 0.162
200 0.016 0.032 0.048 0.064 0.080 0.097 0.113 0.129 0.145
220 0.015 0.029 0.044 0.058 0.073 0.088 0.102 0.117 0.131
240 0.014 0.027 0.040 0.053 0.067 0.081 0.095 0.108 0.121

Legend

  • One drink = 1.5 ounces of hard liquor, 12 ounces of beer, or five ounces of wine.
  • Blue = Impaired driver.
  • Red = BAC of .08% or greater a DUI/DWI in the state of NC.