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BAC Calculator

The ABC's of BAC:  A guide to understanding Blood Alcohol Concentration and Alcohol Impairment

Factors that Influence Blood Alcohol Concentration:

  • amount of alcohol consumed
  • rate at which a person drinks
  • weight and body mass
  • gender- a woman has less water in her body so her BAC would be higher than a man of similar weight 
  • amount of food in a person's stomach- a full stomach slows the pace alcohol absorption.

Men
  Approximate Blood Alcohol Percentage
Drinks Body Weight in Pounds  
  100 120 140 160 180 200 220 240  
0 .00 .00 .00 .00 .00 .00 .00 .00 Only Safe
Driving Limit
1 .04 .03 .03 .02 .02 .02 .02 .02 Driving
Skills
Significantly
Affected

Possible
Criminal
Penalties
2 .08 .06 .05 .05 .04 .04 .03 .03
3 .11 .09 .08 .07 .06 .06 .05 .05
4 .15 .12 .11 .09 .08 .08 .07 .06
5 .19 .16 .13 .12 .11 .09 .09 .08
6 .23 .19 .16 .14 .13 .11 .10 .09 Legally
Intoxicated

Criminal
Penalties
7 .26 .22 .19 .16 .15 .13 .12 .11
8 .30 .25 .21 .19 .17 .15 .14 .13
9 .34 .28 .24 .21 .19 .17 .15 .14
10 .38 .31 .27 .23 .21 .19 .17 .16 Death Possible
Subtract .01% for each 40 minutes of drinking.
One drink is 1.25 oz. of 80 proof liquor, 12 oz. of beer,
or 5 oz. of table wine.
Women
  Approximate Blood Alcohol Percentage
Drinks Body Weight in Pounds  
  90 100 120 140 160 180 200 220 240  
0 .00 .00 .00 .00 .00 .00 .00 .00 .00 Only Safe
Driving Limit
1 .05 .05 .04 .03 .03 .03 .02 .02 .02 Driving Skills
Significantly
Affected

Possible
Criminal
Penalties
2 .10 .09 .08 .07 .06 .05 .05 .04 .04
3 .15 .14 .11 .10 .09 .08 .07 .06 .06
4 .20 .18 .15 .13 .11 .10 .09 .08 .08
5 .25 .23 .19 .16 .14 .13 .11 .10 .09
6 .30 .27 .23 .19 .17 .15 .14 .12 .11 Legally
Intoxicated

Criminal
Penalties
7 .35 .32 .27 .23 .20 .18 .16 .14 .13
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 .19 Death Possible
Subtract .01% for each 40 minutes of drinking.
One drink is 1.25 oz. of 80 proof liquor, 12 oz. of beer, or 5 oz. of table wine.

 

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