EtG Calculator — Ethyl Glucuronide Detection Window
EtG (ethyl glucuronide) is a direct metabolite of ethanol that appears in urine within 30 minutes of drinking and can remain detectable for up to 80–125 hours, making it a sensitive biomarker used in sobriety monitoring. Enter your drink count, standard drink size and time since last drink to estimate whether EtG may still be detectable.
Standard drink definition
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Estimated hours after drinking that EtG remains detectable in urine (100 ng/mL cutoff)
- 1
Total ethanol consumed
4 × 14 g/drink = 56 g - 2
US-drink equivalents
56 ÷ 14 = 4 - 3
Raw window
12 + 12 × 4 = 60 hrs - 4
Detection window
max(24, min(125, 60)) = 60Floored at 24 h, capped at 125 h per published research.
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EtG, a liver metabolite of ethanol, remains detectable in urine for roughly 24–48 hours after light drinking (1–2 drinks) up to 80–125 hours after heavy drinking. This calculator estimates the window as 12 + 12 × US-drink-equivalents (hours), capped at 125 hours and floored at 24 hours. Individual metabolism can shift results by ±20–30%.
Képlet
How this is calculated
When alcohol is metabolised in the liver, roughly 0.02–0.06% is converted to ethyl glucuronide (EtG) by glucuronidation — a pathway that conjugates ethanol to glucuronic acid, making it water-soluble and excreting it through the kidneys. Unlike ethanol itself (which clears in hours), EtG persists much longer. A standard urine immunoassay cutoff of 100 ng/mL is common in workplace and court-ordered testing; the 500 ng/mL cutoff is used when only heavy drinking is of concern.
Published research (Helander et al., Alcohol & Alcoholism; Hoiseth et al., Forensic Science International) consistently shows that after light consumption (1–2 standard drinks), EtG is detectable for approximately 24–48 hours; after moderate drinking (3–6 drinks), 48–80 hours; and after heavy or binge drinking (7+ drinks), up to 80–125 hours. This calculator normalises all drink sizes to US-equivalent drinks (14 g ethanol each) and uses a linear interpolation between these empirical anchors, capped at 125 hours.
Important limitations: individual variation is substantial (liver enzyme activity, hydration, BMI) and can shift the window by ±20–30%. Food intake, the speed of consumption, and individual glucuronidation capacity all influence the result. This calculator provides an educational estimate only — it cannot predict the outcome of an actual laboratory test.
Gyakran ismételt kérdések
Yes. Even a single standard drink can produce a positive EtG result at a 100 ng/mL cutoff for 24–48 hours. At the stricter 500 ng/mL cutoff, a single drink may clear faster — but EtG testing is designed to be sensitive, and even small amounts of alcohol are reliably detected.
Alcohol-containing products (mouthwash, hand sanitisers, some foods) can produce trace EtG, though typically at much lower concentrations. Forensic laboratories and courts are generally aware of this and may use higher cutoffs or request confirmation testing to distinguish incidental exposure from actual drinking.
EtG testing is highly sensitive and is one of the few biomarkers that can detect alcohol use days after the fact. However, sensitivity also means false positives are possible from non-beverage alcohol. Detection windows cited here are based on published studies at a 100 ng/mL cutoff; actual laboratory and legal thresholds may differ.
Más néven
TG we-Calculate Editorial Team. (2026). EtG Calculator — Ethyl Glucuronide Detection Window [Online calculator]. TG we-Calculate. https://we-calculate.com/hu/calculator/etg-calculator
TG we-Calculate Editorial Team. "EtG Calculator — Ethyl Glucuronide Detection Window." TG we-Calculate. 2026. https://we-calculate.com/hu/calculator/etg-calculator.
TG we-Calculate Editorial Team, "EtG Calculator — Ethyl Glucuronide Detection Window," TG we-Calculate, 2026. [Online]. Available: https://we-calculate.com/hu/calculator/etg-calculator
@misc{wecalculate_etg_calculator, title = {EtG Calculator — Ethyl Glucuronide Detection Window}, author = {{TG we-Calculate Editorial Team}}, howpublished = {\url{https://we-calculate.com/hu/calculator/etg-calculator}}, year = {2026}, note = {TG we-Calculate} }
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