Blood Alcohol Content (BAC)

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Blood Alcohol Content

Blood Alcohol Content or Concentration (BAC) or sometimes called Blood Alcohol Level (BAL) refers to the ratio of alcohol to blood in the bloodstream. It is expressed as a percentage. A person with a BAC of 0.10% has 1 part of alcohol per 1,000 parts of blood.

How can the BAC be measured?

BAC can be measured by doing a blood, urine or breath test. BAC can also be estimated by calculating the amount of alcohol, the body weight, the sex, and the time that a person has been drinking. Law enforcement checks the BAC of suspected drunk drivers by doing a breath test using a breathalyzer.

PLEASE DO NOT DRINK AND DRIVE! GET A DESIGNATED DRIVER OR A TAXI.

How long does alcohol stay in your body?

It all depends on how much alcohol you consumed and how fast; it also depends on some other factors like weight and sex. To get an estimate of how long it will take you to sober up, please use this BAC Calculater.

Important!: One drink is a 12 oz beer, 5 oz wine or 1 ½ oz 80-proof liquor (distilled spirit).

BAC Calculator

BAC Calculator
 %

Note: This is NOT an exact measurement (only an estimate). Every person's body is different.

Blood Alcohol Effects

BAC Physical and Emotional Effects
0.02% You may feel relaxed and might experience slow reaction time.
0.04% Your vision is affected.
0.08% Your coordination decreases and your driving skills are impaired. This is the legal drinking limit. You are legally intoxicated and it's illegal to drive in the U.S.
0.10% Your speech may become slurred. Lost of coordination and judgment.
0.15% You may stumble when walking and may have trouble standing up.
0.30% You might vomit and probably pass out.
0.40% You may pass out (unconscious) and may go into a coma.
Over 0.40% Alcohol poisoning and death can occur. Your breathing might stop. This is the lethal blood alcohol level.
DRINK RESPONSIBLY!

BAC Charts

Download the Blood Alcohol Content / Concentration (BAC) Charts (49 Kb). It's a PDF file and you might need to download the Adobe Reader.

Men BAC Chart

# of Drinks Body Weight in Pounds (Lbs)
  100 lbs 120 lbs 140 lbs 160 lbs 180 lbs 200 lbs 220 lbs 240 lbs 260 lbs 280 lbs 300 lbs
1 0.04 0.03 0.03 0.02 0.02 0.02 0.02 0.02 0.01 0.01 0.01
2 0.08 0.06 0.05 0.05 0.04 0.04 0.03 0.03 0.03 0.03 0.03
3 0.11 0.09 0.08 0.07 0.06 0.06 0.05 0.05 0.04 0.04 0.04
4 0.15 0.13 0.11 0.09 0.08 0.08 0.07 0.06 0.06 0.05 0.05
5 0.19 0.16 0.13 0.12 0.10 0.09 0.09 0.08 0.07 0.07 0.06
6 0.23 0.19 0.16 0.14 0.13 0.11 0.10 0.09 0.09 0.08 0.08
7 0.26 0.22 0.19 0.17 0.15 0.13 0.12 0.11 0.10 0.09 0.09
8 0.30 0.25 0.22 0.19 0.17 0.15 0.14 0.13 0.12 0.11 0.10
9 0.34 0.28 0.24 0.21 0.19 0.17 0.15 0.14 0.13 0.12 0.11
10 0.38 0.31 0.27 0.24 0.21 0.19 0.17 0.16 0.15 0.13 0.13
For every hour of drinking subtract 0.015

Women BAC Chart

# of Drinks Body Weight in Pounds (Lbs)
  80 lbs 100 lbs 120 lbs 140 lbs 160 lbs 180 lbs 200 lbs 220 lbs 240 lbs 260 lbs 280 lbs
1 0.06 0.04 0.04 0.03 0.03 0.02 0.02 0.02 0.02 0.02 0.02
2 0.11 0.09 0.07 0.06 0.06 0.05 0.04 0.04 0.04 0.03 0.03
3 0.17 0.13 0.11 0.09 0.08 0.07 0.07 0.06 0.06 0.05 0.05
4 0.22 0.18 0.15 0.13 0.11 0.10 0.09 0.08 0.07 0.07 0.06
5 0.28 0.22 0.18 0.16 0.14 0.12 0.11 0.10 0.09 0.08 0.08
6 0.33 0.26 0.22 0.19 0.17 0.15 0.13 0.12 0.11 0.10 0.09
7 0.39 0.31 0.26 0.22 0.19 0.17 0.15 0.14 0.13 0.12 0.11
8 0.44 0.35 0.29 0.25 0.22 0.20 0.18 0.16 0.15 0.14 0.13
9 0.50 0.40 0.33 0.28 0.25 0.22 0.20 0.18 0.17 0.15 0.14
10 0.55 0.44 0.37 0.31 0.28 0.24 0.22 0.20 0.18 0.17 0.16
For every hour of drinking subtract 0.015