Wondering if ETG is still detectable in your system? Our free ETG Calculator estimates your current Ethyl Glucuronide concentration in ng/mL and predicts exactly how long until it drops below your test’s cutoff threshold — all based on the number of drinks you had, your body weight, biological sex, and how many hours have passed.

No complicated math. No confusing medical jargon. Just clear, instant estimates you can understand in seconds.

What Is an ETG Calculator?

An ETG Calculator is a tool that estimates the concentration of Ethyl Glucuronide — a byproduct of alcohol metabolism — in a person's system and predicts how long it might remain detectable in a urine test.

A standard alcohol test checks for ethanol (alcohol) itself, which typically clears the body within hours. An ETG urine test, however, detects alcohol metabolites that persist for much longer — potentially up to 80 hours after drinking.

The ETG Calculator takes your personal inputs and applies simplified biochemical formulas to estimate:

• Your current estimated ETG level (in ng/mL)
• Whether you'd pass or fail a urine ETG test right now
• How many hours remain until your level drops below the test cutoff

Think of it as a "countdown clock" for your alcohol metabolites.

What Is Ethyl Glucuronide (ETG)?

Ethyl Glucuronide (ETG) is a direct metabolite of ethanol — the type of alcohol found in beer, wine, and spirits. When your liver processes alcohol, the vast majority is broken down into acetaldehyde and then acetate. However, a small fraction (approximately 0.02–0.06%) undergoes a different chemical pathway called glucuronidation, which produces ETG.

Why Does ETG Matter?

ETG is significant for one critical reason: it stays in your body much longer than alcohol itself.

Substance	Approximate Detection Window in Urine
Ethanol (alcohol)	2–12 hours
Ethyl Glucuronide (ETG)	24–80 hours
Ethyl Sulfate (ETS)	24–48 hours

This extended detection window makes ETG a powerful biomarker for recent alcohol consumption. Even after your Blood Alcohol Concentration (BAC) has returned to zero and you feel completely sober, ETG can still be detected in your urine for days.

Where Are ETG Tests Used?

ETG urine tests are commonly used in:

• Court-ordered sobriety monitoring and probation programs
• DUI/DWI compliance monitoring
• Workplace alcohol testing programs
• Professional licensing boards (healthcare workers, pilots, attorneys)
• Substance abuse treatment and rehabilitation programs
• Child custody proceedings
• Collegiate athletics and student conduct cases

Who Needs an ETG Calculator?

An ETG Calculator is useful for anyone who wants to understand the relationship between alcohol consumption and ETG detection. Common scenarios include:

⚖️ Sobriety Monitoring

Individuals under court-ordered or probation-related alcohol testing who want to understand how long metabolites might persist after drinking.

🏥 Treatment & Recovery

People in recovery programs who want to learn how ETG works as part of their education about alcohol's effects on the body.

📚 Education & Awareness

Students, healthcare professionals, and educators learning about alcohol metabolism, pharmacokinetics, and drug testing science.

🔬 Curiosity & Understanding

Anyone who has an upcoming ETG test and wants to understand the science behind ETG detection — not to "beat" a test, but to understand what it measures and how.

Important: This calculator is an educational estimate. It should never be used as the sole basis for decisions about whether it's "safe" to take a test.

Limitations of ETG Calculators

Transparency is important. Here are the honest limitations of any ETG calculator, including ours:

1. Simplified Model

The calculator uses average values for ETG formation (10,000 ng/mL per 0.1% BAC) and elimination (150 ng/mL/hr). In reality, these rates vary widely between individuals — by as much as 2–3x.

2. Linear Elimination Assumption

Real ETG elimination may not be perfectly linear. The calculator assumes a constant rate, but actual elimination can vary over time.

3. Single-Session Assumption

The calculator assumes a single drinking session. Multiple sessions over consecutive days can cause ETG to accumulate, leading to much higher levels than predicted.

4. No Account for Individual Variation

Factors like liver health, genetic enzyme activity, hydration, medications, and food intake are not captured by the inputs.

5. Estimates Only

The output is a mathematical estimate, not a clinical measurement. The only way to know your actual ETG level is through a certified laboratory urine test.

Bottom line: Use this calculator for education and general awareness — never as the sole basis for making decisions about test outcomes.