Free EtG Calculator: Will You Pass?
Calculate your EtG (Ethyl Glucuronide) levels and clearance time instantly using our free EtG tool. Based on the Widmark formula, 100% private, all calculations happen in your browser.
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How We Calculate EtG: The Science
Our EtG formula uses the Widmark equation combined with the latest EtG decay research to calculate your estimated levels. The most accurate EtG tool available without a lab test.
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Visual Decay Curve
See exactly when your levels drop below the 500ng/mL and 100ng/mL cutoffs with our interactive chart.
Real-Time Estimate
Input your drinking history and get an instant 'Pass' or 'Fail' probability based on current time.
Learn More About EtG Testing
Dive deeper into the science of EtG testing with our comprehensive guides and resources.
How to Calculate EtG
Learn the Widmark formula and understand how EtG levels are calculated step-by-step.
Read GuideBest Practices
Tips for understanding your test, detection windows, and what actually helps.
Read GuideEtG vs BAC
Understand the key differences between EtG and Blood Alcohol Concentration tests.
Read GuideFrequently Asked Questions
Common questions about how to calculate EtG, detection windows, and what affects your results.
How accurate is this EtG calculator?
This EtG calculator provides an estimate based on the Widmark formula and average metabolic rates. Individual factors like genetics, liver health, and hydration can significantly affect actual results. Our algorithm is based on peer-reviewed research but should not replace professional medical advice.
Will 3 beers show up on a urine test after 24 hours?
For most people, 3 beers (about 3 standard drinks) will likely still be detectable via EtG after 24 hours, especially at the strict 100 ng/mL cutoff. At the standard 500 ng/mL cutoff, you may test negative. Use our calculator with your specific weight and gender for a personalized estimate.
What is the 80-hour rule for alcohol?
The '80-hour rule' refers to the maximum detection window for EtG in urine. However, this extreme timeframe only applies to very heavy binge drinking (8+ drinks). For moderate drinking (3-5 drinks), the typical detection window is 24-48 hours. Don't panic about 80 hours—it's rare and not typical.
How to pass an EtG test in 24 hours?
If you drank heavily, passing an EtG test in 24 hours is very difficult. Time is the only proven factor for eliminating EtG. Staying hydrated may help slightly but won't speed up metabolism. There's no scientifically proven 'detox' method. The best approach is to allow sufficient time before your test.
Can I speed up the detox process?
No proven method speeds up EtG elimination. Your liver processes alcohol at a fixed rate (about 0.015% BAC per hour). Drinking water helps hydration but doesn't accelerate metabolism. 'Detox drinks' have no scientific evidence supporting their effectiveness. Time is the only reliable factor.
What factors affect EtG levels?
Several factors influence EtG levels: body weight (heavier people have more body water to dilute alcohol), biological sex (males typically have a Widmark factor of 0.68 vs 0.55 for females), liver health, hydration status, amount and type of alcohol consumed, and individual genetic variations.