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EtG Calculator

Using our EtG calculator is a rapid method of estimating how long after stopping drinking, could someone could 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 when the person could pass an EtG alcohol test. (if they did not drink any alcohol)

Quick EtG Calculator

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


The answer depends on whether the test is a standard urine test. More and more test clinics run the EtG type of test.

  • An EtG test is not looking for alcohol. It’s checking for ethyl glucuronide, a metabolite the human body uses to metabolize alcohol.
  • Labs using an EtG test look for whether or not the person metabolized any alcohol 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 for alcohol. So, they may need to know an answer to the question, “how long after I stop drinking will I be able to pass an alcohol screening test.”


In addition, this type of test can be positive for 2 to 3 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 alcohol 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 no EtG in the serum or urine of non-relapsing patients, non-drinker drivers, or teetotalers. Therefore, it is an efficient test to detect alcohol use.

Eighty-hour rule

It has become known as the “80-hour test” for detecting low levels of ethyl alcohol. According to this study, eighty hours is in the very high range (40 to 90). It has emerged as the test of choice for alcohol due to the technology’s accuracy and is now routinely available. In addition, it detects current alcohol 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 EtG in urine is a definitive indicator of consuming alcohol.

  • EtG is superior to any other alcohol biomarkers.


The disadvantage of this type of testing is that it can detect low amounts of alcohol and give false-positive results after exposure to alcohol 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 alcohol problem. More than two positive responses indicate the presence of a problem with a sensitivity and specificity of approximately 90% in most studies.