BAC Chart

(Alcohol % in bloodstream for weight (lbs) and number of drinks)

Women

Number of drinks consumed per hour
Weight 1 2 3 4 5 6 7 8 9
100 .05 .09 .14 .18 .23 .27 .32 .36 .41
120 .03 .08 .11 .15 .19 .23 .27 .30 .34
140 .03 .07 .10 .13 .16 .19 .23 .26 .29
160 .03 .06 .09 .11 .14 .17 .20 .23 .26
180 .03 .05 .08 .10 .13 .15 .18 .20 .23
200 .02 .05 .07 .09 .11 .14 .16 .18 .20
220 .02 .04 .06 .08 .10 .12 .14 .17 .19
240 .02 .04 .06 .08 .09 .11 .13 .15 .17

Men

Number of drinks consumed per hour
Weight 1 2 3 4 5 6 7 8 9
100 .04 .08 .11 .15 .19 .23 .26 .30 .34
120 .03 .06 .09 .12 .16 .19 .22 .25 .28
140 .03 .05 .08 .11 .13 .16 .19 .21 .24
160 .02 .05 .07 .09 .12 .14 .16 .19 .21
180 .02 .04 .06 .08 .11 .13 .15 .17 .19
200 .02 .04 .06 .08 .09 .11 .13 .15 .17
220 .02 .03 .05 .07 .09 .10 .12 .14 .15
240 .02 .03 .05 .06 .08 .09 .11 .13 .14
  1. This guide shows, for a given individual, the Washington State Liquor Control Board’s best guess as to what the breath test results would be for a given amount of drinking. There are so many variables in the formula used to calculate breath test results based upon weight and number of drinks consumed that it has limited utility as a way to precisely determine an individual’s breath alcohol concentration.
  2. One drink=1 ounce of 80 proof spirits; 3 ounce glass of wine; or 8 ounce glass of 5% beer.

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