Drunk Driving: Blood Alcohol Calculator
The Blood Alcohol Calculator below estimates percent of alcohol in the blood by number of drinks in relation to body weight.
*** Mays Law Office, LLC. does not promote drinking and driving in any form. Alcohol may affect each person differently. The figures shown in this chart are for reference only and not to be used as a gauge for safe alcohol consumption.
This percent can be estimated by:
- Count your drinks (1 drink equals 1 ounce of 100-proof liquor, one five ounce glass of table wine or one 12-ounce bottle of regular beer).
- Use the chart below and under number of “drinks” and opposite “body weight” find the percent of blood alcohol listed.
- Subtract from this number the percent of alcohol “burned up” during the time elapsed since your first drink. This figure is .015% per hour. (Example: 180 lb. man – 8 drinks in 4 hours / .167% minus (.015 x 4) = .107 %
Drunk driving laws are intended to prevent the operation of a powerful and potentially dangerous machine when the operator cannot be in adequate control. Intoxication is shown in one of two ways:
- A blood alcohol level in excess of a certain amount (as indicated above)
- Proving that the driver or operator was impaired from the use of alcohol or illegal drugs.
The maximum blood alcohol level varies from state to state. For many years, the most common maximum level was .10 percent, but most states have now lowered the level to .08. Any driver or operator who has a blood alcohol level over the legal limit is considered legally intoxicated. The results of the test are usually considered conclusive, and can be challenged only by showing that the test failed for a reason such as faulty or malfunctioning test equipment, improper sampling, faulty preservation of the sample, or (in the case of a breath test) a foreign object in the mouth when the test was conducted.
Attorney Stephen E. Mays practices in all areas of criminal and traffic defense throughout the entire State of Wisconsin. If you have been charged with a traffic violation or criminal conduct, call Mays Law Office – Click toll-free: (866) 257-0440 attorney Stephen E. Mays today for a free case review.