EtG Elimination Calculator: When Will You Test Negative?
In EtG testing, elimination usually means the time required for your estimated level to drop below the lab cutoff, not the time to reach zero. Enter your drinking history and body data for a personalized clearance timeline.
Editorial note
This educational page is maintained by EtGCalc and reviewed against published EtG research, SAMHSA guidance, and our calculator methodology. It does not provide medical or legal advice.
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How to Use This Calculator
Enter your sex, weight, drink count, drink type, and time since your last drink. The calculator estimates your EtG level and compares it with common 100 ng/mL and 500 ng/mL cutoffs. For a broader explanation, read our EtG calculation guide.
1What EtG Elimination Means
EtG elimination is the decline of ethyl glucuronide concentration after alcohol has been processed. For testing, the practical question is whether the estimated level is above or below a cutoff.
Most programs use either 500 ng/mL or 100 ng/mL. The stricter 100 ng/mL threshold can extend the modeled elimination time by several hours.
- Elimination does not mean zero EtG
- The cutoff defines pass/fail interpretation
- Higher drinking levels start from a higher peak
2100 ng/mL vs 500 ng/mL Elimination
A 500 ng/mL cutoff is less sensitive and usually produces a shorter detection window. A 100 ng/mL cutoff is more sensitive and can classify low residual levels as positive.
This is why two people with the same estimated level can interpret the result differently depending on the program or lab threshold.
Cutoff changes everything
The difference between 100 and 500 ng/mL can be the difference between a negative result and a low positive result.
3Factors Affecting Elimination Speed
Body weight, biological sex, drinking quantity, liver function, hydration, and timing all affect the model. The calculator estimates the most likely trajectory, but biology varies.
For compliance-sensitive situations, treat the final number as a planning estimate and leave extra time.
- Drinks consumed and drinking duration
- Body water and Widmark factor
- Time since last drink
- Lab cutoff and urine concentration
Common Elimination Scenarios
| Scenario | Estimate | Context |
|---|---|---|
| 1-2 drinks | Often 12-24h | Usually shortest modeled window |
| 3-4 drinks | Often 18-36h | Cutoff matters |
| 5-7 drinks | Often 24-48h | Higher peak level |
| 8+ drinks | Can exceed 48h | Wide individual variation |
Frequently Asked Questions
Does EtG elimination mean zero?
No. For testing, elimination usually means falling below the cutoff used by the lab.
Which cutoff clears faster?
The 500 ng/mL cutoff clears faster than the stricter 100 ng/mL cutoff.
Can I speed up EtG elimination?
There is no proven shortcut that speeds liver metabolism. Time is the reliable factor.
Why do calculators disagree?
They may use different peak EtG assumptions, half-lives, Widmark factors, or cutoffs.
Should I add a safety margin?
Yes. Individual variation makes a safety margin prudent when a test has real consequences.
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Medical & Legal Disclaimer
Not Medical Advice
EtGCalc does not provide diagnosis, treatment, or medical advice. Talk with a qualified healthcare provider about alcohol use, metabolism, testing concerns, or recovery.
Not Legal Advice
EtG testing can affect probation, custody, licensing, and employment decisions. Consult a licensed attorney or your testing program for legal questions.
If You Need Support
In the United States, SAMHSA's National Helpline is 1-800-662-4357. It is free, confidential, and available 24/7.
Calculator output is an estimate, not a test prediction. Individual metabolism, hydration, kidney function, genetics, specimen handling, and lab cutoff policy can change real results. See our methodology and sources.
References
- 1SAMHSA. The Role of Biomarkers in the Treatment of Alcohol Use Disorders, 2012 Revision.
Used for biomarker context, cutoff interpretation, and incidental exposure cautions.
- 2Jatlow et al. Ethyl glucuronide and ethyl sulfate assays in clinical trials, 2014.
Used for urinary EtG and EtS kinetics after alcohol exposure.
- 3McDonell et al. Using ethyl glucuronide in urine to detect alcohol use, 2015.
Used for EtG detection window context in clinical monitoring populations.
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