Calculator
Estimate your ETG levels based on drinks, weight, and gender.
ETG Levels Chart
| Drink | ETG Level (%) |
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Understanding ETG Levels per Drink
ETG (ethyl glucuronide) is a direct metabolite produced after alcohol is processed by the liver. ETG is commonly measured in urine tests to detect recent alcohol exposure. The ETG Levels per Drink Calculator helps you estimate the relative ETG produced by each standard drink and shows how those levels decline over time. This tool is useful for anyone tracking sobriety, preparing for testing, or learning about ETG detection time.
What This ETG Calculator Estimates
The calculator produces three practical outputs:
- Estimated starting ETG concentration (ng/mL) — a simplified peak level based on number of drinks, drink size, weight, and gender.
- Estimated detection window (hours) — how long ETG may remain above common cutoffs.
- Decay curve — a visual timeline showing how ETG levels decrease until they reach near-zero.
How ETG Levels Are Estimated
To keep the calculator fast and intuitive, we use a straightforward model: each standard drink increases the estimated starting ETG by a fixed amount (scaled by drink alcohol content). The model then applies a decay rate tied to an estimated detection window. Mathematically, the estimated ETG level at time is:
level(t) = max(startingLevel − (startingLevel / detectionHours) × t, 0)
This ensures the plotted curve reaches near-zero around the estimated detection window. The model is intentionally conservative and designed to produce realistic ETG detection visuals rather than clinical predictions.
Factors Affecting ETG Levels
Several personal and behavioral factors change ETG production and elimination:
- Amount consumed: More alcohol = higher ETG starting level and longer detection window.
- Body weight & composition: Lower body weight usually results in higher concentration.
- Metabolic rate & liver function: Faster metabolism shortens detection time.
- Hydration: Dilution can lower measured ETG concentration.
- Frequency of drinking: Repeated sessions accumulate ETG and extend detectability.
Typical ETG Cutoff Levels Explained
Different programs use different cutoffs. For context:
- 100 ng/mL — high sensitivity (used in rehab/strict monitoring).
- 200–300 ng/mL — moderate sensitivity.
- 500 ng/mL — lower sensitivity (commonly used in probation testing).
Use those cutoffs to interpret the chart: if your curve stays above 100 ng for X hours, that gives a sense of high-sensitivity detectability.
How to Use the ETG Levels Calculator
- Enter the number of standard drinks you consumed (or expect).
- Choose the drink size if you consumed smaller or larger drinks.
- Provide your weight and gender to personalize the estimate.
- Optionally set the time of the first drink to calculate exact timestamps.
- Review the chart showing estimated ETG levels over 0–120 hours and the quick table for key numbers.
Practical Tips for ETG Testing
To reduce risk of an unexpected positive result:
- Avoid alcohol-containing mouthwashes and sanitizers prior to testing.
- Stay well hydrated, but remember dilution has limits and tests can check creatinine.
- Inform testing authorities of any medications or conditions that could affect results.
Related ETG Tools & Deeper Analysis
For more detailed or alternate views, try these tools on this site:
- ETG 100 ng Calculator – high-sensitivity scenario
- ETG 200 ng Calculator – moderate sensitivity
- ETG 500 ng Calculator – standard probation cutoff
- ETG Levels Chart – visual reference
- ETG Half-Life Calculator – see effect of different half-lives
Limitations & Final Notes
This calculator is educational. ETG concentrations depend on many physiological variables — only a laboratory test can determine actual ETG ng/mL. Use this tool for planning, awareness, and learning, not for legal decision-making alone.