How long does 1 standard drink stay in your breath?

What Is the Effect of One Beer on Your Breath? A standard drink, including one beer, contains about 14 grams of alcohol on average. That puts an average person's BAC at 0.02. After about one hour, your BAC should be close to zero if you have not consumed any other alcoholic beverages.



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In some cases, the breathalyzer may detect alcohol for up to 12 hours. In other individuals, the breathalyzer test may work for twice that long. Although the average person metabolizes about 1 alcoholic drink per hour, this rate varies.

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How Long Does Alcohol Stay on My Breath? Alcohol can be detected on the breath for 12 to 24 hours after the last drink.

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