How Long Does it Take Alcohol to Leave Your System?

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Each individual metabolizes alcohol at a consistent rate of one standard drink per hour. That said, how long it takes alcohol to leave your system varies depending on factors that include age, gender, body composition, and overall health.

How Long Does It Take for Alcohol to Leave Your System?

The presence of alcohol in the body can be measured through various tests. Blood tests can detect alcohol up to 6 hours after the last drink, while breathalyzer tests are effective for around 12 to 24 hours. EtG (ethyl glucuronide) urine tests can also detect alcohol consumption for approximately 12 to 24 hours. Additionally, alcohol can be detected in saliva for approximately 12 to 14 hours and in hair follicles for up to 90 days after the last alcoholic drink.

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 When Does Liquor Leave Your System?

Liquor undergoes a metabolic process primarily in the liver through the action of an enzyme called ADH (alcohol dehydrogenase). On average, the liver can metabolize one standard drink per hour for men, resulting in a reduction of BAC (blood alcohol concentration) by approximately 0.015g/100mL/hour. Aside from liver processing, roughly 10% of alcohol is eliminated through sweat, breath, and urine.

 A standard drink is classified as:

  • 12oz regular beer
  • 8oz malt liquor
  • 5oz wine
  • 1.5oz distilled spirits (vodka, whiskey, tequila, gin, rum)

 The duration for which alcohol remains in the body can be influenced by various factors, including the quantity consumed. Other factors that can affect the metabolism of alcohol are as follows

  • Gender: In general, women tend to have a higher percentage of body fat and a lower percentage of water compared to men. Although this may not be true for everyone, it can lead to alcohol staying in a woman’s system for a longer duration.
  • Food: The presence of food in the digestive tract slows down the absorption of alcohol, resulting in a longer duration of alcohol in the system. However, consuming food along with alcohol can also reduce the intensity of its effects.
  • Body composition: Individuals with smaller body frames may experience higher levels of BAC from the same amount of alcohol compared to taller individuals due to the higher concentration of alcohol in smaller bodies.
  • Medication: Certain medications – antidepressants and antibiotics, for instance – can affect how the body processes alcohol. It is always advisable to consult a doctor for guidance if you plan to consume alcohol while taking any medication.

How Fast Does Alcohol Leave Your System?

How long it takes for alcohol to leave your system depends on various factors, including your metabolism, the amount and strength of the alcohol consumed, your body weight, hydration level, and overall health. While the liver plays a crucial role in metabolizing alcohol, the process of eliminating alcohol from your system follows a general timeline.


Consider this typical elimination timeline if you want to know when is alcohol out of your system: 

  • Absorption: After consuming alcohol, the substance is rapidly absorbed into the bloodstream through the stomach and small intestine. The rate of absorption can be influenced by factors including the concentration of alcohol, the presence of food in the stomach, and individual differences in metabolism.
  • Peak BAC: Peak BAC occurs when alcohol absorption reaches its maximum level in the bloodstream. The time it takes to reach peak BAC can vary, typically ranging from 30 minutes to two hours after consuming an alcoholic beverage.
  • Metabolism: Once alcohol enters the bloodstream, the liver starts metabolizing the substance. The main enzyme responsible for alcohol metabolism is ADH (alcohol dehydrogenase). The liver typically metabolizes one standard drink per hour.
  • Elimination: Alcohol is chiefly eliminated from the body through metabolism, but a small amount is also excreted through urine, sweat, and breath. The elimination rate of alcohol is generally constant and follows a roughly linear pattern.

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Alcohol typically takes 1 hour to metabolize a standard drink. That said, alcohol can be detected in urine or breath tests for up to 24 hours or longer, depending on the testing method used.
The duration for liquor to leave your system varies, but on average, it takes about 1 hour to metabolize 1.5oz of liquor.


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