EtG Calculator

EtG (Ethyl Glucuronide) is a direct metabolite of ethanol that forms when your body processes alcohol. It's widely used for alcohol testing because it remains detectable in urine for 2-5 days after drinking, much longer than alcohol itself or blood alcohol content (BAC). This extended detection window makes EtG testing ideal for monitoring abstinence in legal programs, workplace testing, DUI cases, and addiction recovery programs. Unlike breathalyzers that only detect current intoxication, EtG tests can prove recent alcohol consumption even days later. EtG is highly specific to alcohol - it's not produced by any other substance - making it a reliable biomarker for detecting alcohol use.

EtG detection time varies based on several factors, but generally ranges from 24 to 80 hours (1-3 days) for moderate drinking, and can extend up to 120 hours (5 days) for heavy alcohol consumption. Key factors affecting detection time include: amount of alcohol consumed (more drinks = longer detection), body weight and composition (higher weight = faster elimination), hydration level (well-hydrated = faster elimination), liver function (healthy liver = faster processing), and individual metabolism rate. The simplified calculator on this page uses typical ranges, while our full calculator accounts for these individual variations to provide more personalized estimates. Remember that these are estimates - actual detection times can vary based on unique personal factors.

This simplified calculator provides quick estimates based on core factors (drinks consumed, body weight, time elapsed, and gender) using scientifically validated EtG elimination models. It's designed for fast assessments and general reference. For accuracy of ±15-25%, this tool is excellent for quick decision-making. However, individual EtG elimination can vary significantly based on factors like metabolism rate, hydration, liver health, frequency of drinking, and specific testing methods used. For more accurate predictions, use our Full Version calculator which includes advanced parameters such as metabolism modifiers, hydration levels, multiple drinking sessions, and customizable detection thresholds. Neither version can guarantee test results - they're informational tools, not diagnostic instruments.

The simplified calculator (on this page) uses 4 basic inputs (drinks, weight, time, gender) and provides instant status estimates (Negative/Borderline/Positive) in about 10 seconds. It's perfect for quick assessments and first-time users. The Full Version calculator includes: advanced parameters (metabolism rate, hydration level, liver function), support for multiple drinking sessions with different timings, interactive charts showing EtG decline over time, calculation history to track multiple scenarios, detailed result interpretation with confidence ranges, customizable detection thresholds (100/500 ng/mL), and downloadable reports. If you need a quick answer, use the simplified version. If you're preparing for an important test or want deeper analysis, use the full calculator for more comprehensive results.

Absolutely not. We take privacy very seriously - all calculations happen entirely in your web browser using client-side JavaScript. Your inputs and results never leave your device, are not sent to our servers, and are not stored in any database or logged anywhere. We don't collect, store, track, or share any personal information, test data, or calculation results. There are no accounts to create, no data to consent to sharing, and no third-party analytics tracking your calculations. When you close your browser, your calculation data is completely gone. This privacy-first approach ensures your sensitive information about alcohol consumption remains completely confidential. You can even use this tool offline once the page loads.

No. While our calculators are based on scientific research and provide reasonable estimates, they should NOT be used for legal decisions, medical diagnoses, or as a substitute for official EtG testing. Individual EtG elimination rates can vary significantly due to personal factors we can't account for, including unique metabolism, health conditions, medications, and genetic variations. This tool is for educational and informational purposes only - to help you understand EtG detection science and make informed personal decisions. If you're facing a legal EtG test (probation, DUI monitoring, court-ordered testing), employment screening, or medical monitoring, only an official laboratory test can provide legally or medically valid results. Always consult with qualified legal or medical professionals for decisions affecting your legal status, employment, or health. Our calculators are learning tools, not diagnostic or legal instruments.