ETG Calculator
Estimate the likelihood of testing positive for alcohol (EtG) in a urine test.
Calculation Result
Est. Time to Clear (0 ng/mL)
Current Est. EtG Level
Detection Probability
IMPORTANT DISCLAIMER: This tool is for educational purposes only. EtG metabolism varies significantly by individual health, hydration, and genetics. Never use this result to violate probation/legal orders or to make medical decisions. This is an estimation, not a lab guarantee.
What is an EtG Calculator?
An EtG Calculator is a tool designed to estimate the presence of Ethyl Glucuronide (EtG) in your urine. EtG is a direct metabolite of alcohol (ethanol). Unlike standard breathalyzers that measure current intoxication, an EtG test detects *past* alcohol consumption.
This test is commonly known as the "80-hour alcohol test" because EtG can theoretically be detected in urine for up to 80 hours after heavy drinking, although a detection window of 24-48 hours is more common for moderate drinking.
How Does the EtG Calculation Work?
Our AI-powered calculator uses a half-life decay model to estimate EtG levels. Here are the key factors:
- Number of Drinks: The more alcohol consumed, the higher the initial "load" of EtG in the body.
- Time Elapsed: EtG has a half-life of approximately 2-3 hours. This means every few hours, the concentration in your body cuts in half.
- Cutoff Levels: Most labs use a cutoff of 500 ng/mL (standard) or 100 ng/mL (strict probation). If your estimated level is above this, you test positive.
Factors That Affect EtG Detection Time
While our calculator provides a solid baseline, several biological factors influence the actual results:
- Metabolism Rate: People with faster metabolisms eliminate toxins quicker.
- Hydration: Drinking water can dilute urine, potentially lowering EtG concentration (though labs test for dilution).
- Body Mass (Weight): Your weight affects how alcohol is distributed in your body.
- Liver Health: A healthy liver processes alcohol and its metabolites more efficiently.
Standard Drink Reference (USA)
To ensure accuracy when using the calculator, please count your drinks based on US Standard Drink sizes:
- Beer: 12 fluid ounces (approx 5% alcohol).
- Wine: 5 fluid ounces (approx 12% alcohol).
- Distilled Spirits (Vodka, Whiskey, Gin): 1.5 fluid ounces (approx 40% alcohol).
Frequently Asked Questions
Common questions about EtG Urine Tests.
It depends on how much you drank. For 1-3 drinks, 48 hours is often enough to clear EtG below the 500 ng/mL cutoff. However, for heavy binge drinking, EtG can remain detectable for longer.
The "80-hour rule" is a common term suggesting alcohol is detectable for nearly 4 days. While scientifically possible in extreme cases, most studies show detection is most accurate within 12 to 48 hours for moderate drinking.
Drinking water dilutes urine, which lowers the concentration of EtG. However, testing labs check "creatinine" levels to detect dilution. If your sample is too diluted, it may be flagged as a "Dilute" result, which is often treated as a fail in probation settings.
Incidental exposure to alcohol can cause low-level positives. This includes mouthwash, hand sanitizers, certain medicines (like NyQuil), or even eating food cooked with wine.
ETG levels cannot be calculated exactly at home because they depend on many factors like how much alcohol you drank, your body weight, metabolism, liver health, and time passed since drinking. Normally, ETG levels are measured through a urine test in a lab. An ETG calculator only gives an estimated idea, not an exact result.
An ETG calculator is not 100% accurate. It provides only an approximate estimate based on general data. Actual ETG levels can vary from person to person, so lab testing is the only reliable way to know the exact ETG level.
You can estimate your ETG level by using an ETG calculator where you enter details like alcohol amount, drinking time, and body information. However, this is just for reference. For precise results, a urine ETG test is required.
An ETG calculator is an online tool that helps estimate how long ETG (Ethyl Glucuronide) may stay detectable in the body after drinking alcohol. It is mainly used for awareness and planning, not for medical or legal confirmation.