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EtG Calculator

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Using our EtG calculator is a rapid method of estimating how long after stopping drinking, could someone pass this type of alcohol urine test.

How to use

  1. Under “Day,” use the drop-down menu to select the day of the week the person stopped drinking alcohol.
  2. In the second line, under the word “Time,” type in the hour, then a minute, and then either “AM” or “PM.”
  3. Hit the “Calculate” Button

The answer will appear as a DAY and TIME. That is the approximate time that person could pass an alcohol test. (assuming they did not drink in the meantime).

Quick EtG Calculator

This person is at high risk to fail an EtG test until at least:


Ethyl Glucuronide (ETG) is a metabolite of ethanol, the primary active ingredient in liquor beverages. It is produced when the body metabolizes ethanol, and it can be detected in the body for a longer period than the alcohol itself.This type of testing is is becoming increasingly popular due to its high level of accuracy, hits extended timeline and overall reliability.

It is a highly sensitive method that can detect even low levels of ethanol having been metabolized in the body recently. It can detect the presence of EtG in urine, blood, and hair samples for up to 80 hours after any was consumed. This makes it a highly useful tool for monitoring, especially in situations where individuals are required to abstain from any consumption.

Interested Parties

ETG screening is often used in a variety of settings, including workplace, probation monitoring, and drug treatment programs. It is especially useful in situations where consumption must be strictly prohibited, such as in drug courts or DUI programs. It can also be used to detect use in individuals who may be trying to hide their consumption, as it can detect even small amounts that were recently consumed.


One of the advantages of is its high accuracy and reliability. Unlike traditional methods, such as simple urine screening, it is not affected by external factors, such as mouthwash or other substances that may interfere with the results. This makes it a highly reliable method.


However, there are some limitations. For example, it cannot differentiate between consumption and exposure in other forms, such as through hand sanitizer or mouthwash. Additionally, it may not be suitable for individuals with liver disease or other conditions that affect the body’s ability to metabolize it.

  • It is not looking for alcohol per se. It’s checking for ethyl glucuronide, a primary metabolite the human body uses to metabolize it.
  • Labs use it to screen for whether or not the person metabolized any of it recently.
Black EtG calculator

These results provide a detection time from stopping drinking until 65 hours afterward. However, the results are only an approximation based on several studies and do not guarantee to pass a test. People on probation or in an outpatient program.


In addition, this type of test can be positive for 3 to 5 days, even after low to moderate drinking. According to this detoxification study of heavy drinkers, the detection time ranged from 40 to 90 hours, with an average of 65 (2.5 days). According to other research, the range was 30 to 110 hours following heavy consumption. EtG is a biomarker that determines whether the body has metabolized any alcohol recently. It is testing for the presence of ethyl glucuronide in the urine. However, most studies show none in the serum or urine of non-relapsing patients, non-drinker drivers, or teetotalers. Therefore, it is an efficient test to detect use.

Eighty Hour Rule

It has become known as the “80-hour test” for detecting low levels of ethanol. According to this study, eighty hours is in the very high range (40 to 90). It has emerged as the test of choice due to the technology’s accuracy and is now routinely available. In addition, it detects current consumption, even after ethanol is not present, using other methods. It is very stable at room temperature for up to 140 hours, making it a practical test even if it is necessary to relocate the specimen. Therefore, the appearance of this in the urine is a definitive indicator of consuming it.

  • It is superior to any other biomarker.


The disadvantage of this type of testing is that it can detect low amounts of it and give false-positive results after exposure to it from non-beverage sources or incidental disclosures. These incidents can include mouthwash, certain foods, or even over-the-counter medications. There is a renewed interest in testing hair instead of urine, increasing the detection time frame. However, it is still not used very often. Previously, testing hair had been fraught with problems, inaccuracies, and lawsuits. Most health care professionals know and employ the CAGE questioning technique as follows: C – Has anyone ever felt you should Cut down on your drinking? A – Have people Annoyed you by criticizing your drinking? G – Have you ever felt Guilty about your drinking? E – Have you ever had a drink first thing in the morning ( Eye-opener) to steady your nerves or to get rid of a hangover? A single positive response to the CAGE questions suggests an drinking problem. More than two positive responses indicate the presence of a problem with a sensitivity and specificity of approximately 90% in most studies.

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