The Most Accurate EtG Calculator Online
Our advanced EtG calculator provides a reliable estimate of your alcohol detection window for an 80-hour test. Simply input the drinks you consumed, your body weight, and the time of your last drink to instantly see your estimated clearance time. This tool is designed to help you understand how long EtG may be detectable in your system, empowering you with crucial information. For educational and informational purposes only.
EtG Calculator
Get an instant estimate of when EtG might clear from your system. Follow the simple steps below.
We need your basic info to calculate accurate results
Select the exact date and time of your last alcoholic drink
Click on drinks you consumed or add custom drinks
Quick Add Common Drinks
Add Custom Drink
What is an EtG Calculator?
An EtG (Ethyl Glucuronide) calculator is a specialized tool designed to estimate how long alcohol metabolites remain detectable in your system. EtG is a direct metabolite of ethanol that forms when your liver processes alcohol, and it can be detected in urine for up to 80 hours after your last drink.
Unlike traditional breathalyzer tests that only detect active alcohol in your bloodstream, EtG tests are used to identify recent alcohol consumption even after the alcohol itself has been eliminated from your body. This makes EtG testing particularly valuable for monitoring programs, legal proceedings, and workplace testing.
Our calculator uses established scientific formulas and metabolic models to provide you with an educated estimate of when EtG levels might drop below standard testing thresholds, helping you understand your personal alcohol detection window.
How Our EtG Calculator Works
Our calculator employs a sophisticated approach combining the Widmark formula for blood alcohol estimation with established EtG pharmacokinetic models. Here's how the calculation process works:
We calculate the total grams of pure alcohol consumed based on your specific drink inputs, accounting for volume and alcohol by volume (ABV) percentages.
Using the Widmark formula, we estimate peak blood alcohol concentration based on your body weight, biological sex, and total alcohol consumed.
We model EtG formation and peak levels, which typically occur 2-5 hours after drinking, based on the estimated blood alcohol levels.
Using EtG's established half-life of 2-3 hours, we calculate when levels drop below the standard 500 ng/mL testing threshold.
Example Calculation:
A 180-lb male who consumed 3 standard beers (42g alcohol total) with his last drink at 10 PM might see EtG levels peak around midnight-1 AM and drop below detectable levels approximately 24-36 hours later, depending on individual factors like metabolism and hydration.
Key Features & Benefits
Get immediate results with real-time calculations. No registration, no fees, no hidden costs.
Add exact drinks with preset options or custom volumes and ABV for maximum accuracy.
All calculations happen in your browser. We don't store, track, or share any personal data.
Fully responsive design works perfectly on phones, tablets, and desktop computers.
Easy-to-understand status indicators and detailed timeline information.
Clear disclaimers about accuracy limitations and individual variation factors.
Multiple Use Cases
Our EtG calculator serves various professionals and individuals who need to understand alcohol metabolism timelines:
Attorneys, probation officers, and court personnel use EtG calculations to understand compliance timelines for clients in monitoring programs or legal proceedings.
Doctors, nurses, and addiction counselors utilize EtG information for treatment planning, monitoring recovery progress, and patient education.
People in alcohol monitoring programs, treatment programs, or workplace testing situations who need to understand their personal detection windows.
Human resources professionals and safety coordinators who need to understand alcohol testing timelines for workplace safety and compliance purposes.
Trusted by Professionals (Disclaimer)
Important: This is an Estimation Tool
While our calculator is based on established scientific principles and is used by professionals for educational purposes, it's crucial to understand that this is an estimator, not a guarantee. Individual metabolism varies significantly based on factors we cannot account for.
Factors that can affect accuracy include:
- Individual liver function and metabolism rate
- Hydration levels and kidney function
- Overall health status and medications
- Food consumption and timing
- Test sensitivity and laboratory procedures
- Genetic variations in alcohol metabolism
This tool should never be used to make decisions about driving, legal compliance, or medical treatment.Always consult with qualified professionals and follow official testing protocols. We build trust through transparency about our limitations, not false promises of certainty.