Blood Alcohol Chart

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. Do not use this chart as a way to determine if you are “legal” to drive. Bear in mind that a DUI charge can be brought even if the driver’s reading was under .08 if there is evidence that the driver was under the influence of alcohol.

2. One drink=1 ounce of 80 proof spirits; 3 ounce glass of wine; or 8 ounce glass of 5% beer.

Understanding BAC Levels and the Risks of Impaired Driving

Blood alcohol content charts are useful for understanding how alcohol may affect the body, but they are only estimates and should never be relied on to determine whether it is safe or legal to drive. BAC levels can vary significantly based on body weight, metabolism, drinking speed, food intake, and other individual factors, meaning impairment can occur well before or even below commonly referenced legal limits like 0.08%. Because of these variables, even small amounts of alcohol can impact judgment, coordination, and reaction time in ways that increase the risk of impaired driving. If there is any uncertainty about your level of impairment, the safest decision is always to avoid driving altogether and choose a sober alternative. Contact our Washington DUI attorney today to learn more!