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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