Blood Alcohol Concentration Chart for Females

Blood Alcohol Concentration Chart for Females 1

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

Driving Skills Impaired
Legally Drunk

Number of drinks consumed per hour 2
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 .02 .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

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.

This is merely I guideline and should not be relied upon when determining whether or not to drive after consuming alcoholic beverages. Some individuals with the same physical attributes and consuming the some drinks can potentially trigger different readings.