A group of KU students holding a sign that reads "9 out of 10 Jayhawks use a designated driver when drinking"

Blood Alcohol Content

The definition of blood alcohol content is the concentration of alcohol in one's bloodstream, expressed as a percentage. Blood alcohol content, or BAC, is used to determine whether a person is legally intoxicated, especially in operating or attempting to operate a motor vehicle.

In Kansas, it is illegal to operate or attempt to operate a motor vehicle while having a BAC of .08% or above. If you are under 21 years of age, the Zero Tolerance Law makes it illegal to operate or attempt to operate a motor vehicle with a BAC of .02 or above.

There are many factors that can affect a person's BAC:

  • Alcohol content of drinks consumed
  • Period of time drinks are consumed
  • Gender
  • Weight
  • Personal Health
  • Food Consumption
  • Medication

BAC Chart for Males

BAC Chart for Males
 Approximate Blood Alcohol Percentage 
 Body Weight in Pounds 
Drinks100120140160180200220240Notes
0.00.00.00.00.00.00.00.00Only safe driving limit
1.04.03.03.02.02.02.02.02Driving skills significantly affected
2.08.06.05.05.04.04.03.03
3.11.09.08.07.06.06.05.05Possible criminal penalties
4.15.12.11.09.08.08.07.06
5.19.16.13.12.11.09.09..08Legally intoxicated
6.23.19.16.14.13.11.10.09
7.26.22.19.16.15.13.12.11
8.30.25.21.19.17.15.14.13Criminal penlties
9.34.28.24.21.19.17.15.14 
10.38.31.27.23.21.19.17.16Death possible
 Subtract .01% for each 60 minutes of drinking. 
One drink is 1.5 oz. of 80 proof liquor, 5 oz. of wine or 12 oz. of beer.
 

BAC Chart for Females

BAC Chart for Females
 Approximate Blood Alcohol Percentage 
 Body Weight in Pounds 
Drinks90100120140160180200220240Notes
0.00.00.00.00.00.00.00.00.00Only safe driving limit
1.05.05.04.03.03.03.02.02.02Driving skills significantly affected
2.10.09.08.07.06.05.05.04.04
3.15.14.11.10.09.08.07.06.06Possible criminal penalties
4.20.18.15.13.11.10.09.08.08Legally intoxicated
5.25.23.19.16..14.13.11.10.09
6.30.27.23.19.17.15.14.12.11
7.35.32.27.23.20.18.16.14.13Criminal penlties
8.40.36.30.26.23.20.18.17.15
9.45.41.34.29.26.23.20.19.17
10.51.45.38.32.28.25.23.21.19Death possible
 Subtract .01% for each 60 minutes of drinking. 
One drink is 1.5 oz. of 80 proof liquor, 5 oz. of wine or 12 oz. of beer.