About | EtG Calculator Hub

EtG Calculator Hub is an independent online resource built around one goal: helping people understand ethyl glucuronide (EtG) testing through clear, easy-to-use calculators and educational content. If you’ve ever searched for how alcohol consumption relates to EtG detection windows, or wondered what a cutoff value like 100 ng/mL actually means, this website was created for you.

We are not a laboratory, medical clinic, treatment center, or legal service. We don’t run tests, interpret personal lab results, or provide medical or legal advice. What we do offer is a set of straightforward, research-informed calculators designed to help visitors explore EtG-related concepts using simple math and publicly understood testing frameworks.

Our Purpose

EtG testing can be confusing. Terms like “detection window,” “cutoff value,” and “urine EtG concentration” are often used without much explanation, and the underlying science can feel inaccessible to everyday users. EtG Calculator Hub exists to close that gap.

Our purpose is simple: make EtG-related calculations easier to understand through accessible online tools. Whether someone is trying to grasp how alcohol amount and time might relate to EtG estimates, or simply wants to learn how cutoff values work, our goal is to present that information in a way that’s approachable rather than overwhelming.

We built this site because we believe education around EtG testing shouldn’t require a science degree — it should be available to anyone with a question and an internet connection.

What We Provide

EtG Calculator Hub offers a small, focused set of tools rather than a sprawling catalog of unrelated calculators. Each one is designed with a specific purpose:

EtG Calculator — A straightforward tool for exploring basic EtG-related estimates using simplified inputs. It’s designed for users who want a quick, general starting point.

Advanced EtG Calculator — This tool incorporates additional variables for users who want a more detailed model. It doesn’t produce a more “accurate” real-world result than the basic version — it simply allows for more nuanced input, which can be useful for exploring how different factors might interact.

ETG 100 ng/mL Calculator — A tool focused specifically on the commonly referenced 100 ng/mL cutoff, helping users understand how this particular threshold is discussed in the context of EtG testing.

The difference between our simple and advanced tools comes down to input complexity, not scientific certainty. Both are mathematical models built for educational exploration, not diagnostic or predictive instruments.

Our Approach

Every calculator on EtG Calculator Hub is built around a few core principles:

  • Transparent assumptions — We aim to be upfront about what a calculator does and doesn’t account for.
  • Research-informed concepts — Our tools are shaped by publicly available research and general understanding of alcohol metabolism and EtG testing, not proprietary or clinical data.
  • Clearly defined inputs — Users should know exactly what information they’re entering and why.
  • Clearly explained outputs — Results are presented as estimates, not conclusions.
  • Conservative interpretation of uncertainty — When a topic involves significant individual variation, we try to reflect that uncertainty rather than smooth it over.

It’s important to state this plainly: a mathematical model is not a laboratory measurement. Our calculators process the numbers a user provides and apply general formulas — they do not analyze urine samples, and they cannot replicate what a certified lab test does.

Why Transparency Matters

EtG results in real-world testing can vary significantly from person to person, which is exactly why we’re careful about how we describe our tools. A number of factors can influence actual EtG outcomes, including:

  • Amount of alcohol consumed
  • Time elapsed since drinking
  • Individual metabolism
  • Urine concentration and hydration levels
  • Kidney function
  • The specific laboratory methods used
  • The cutoff value applied by the testing facility

No calculator — including ours — can fully account for the interaction of all these variables in a specific individual. We mention them not to overstate their impact, but to help users understand why calculator estimates and actual lab results can differ. Transparency about these limitations is central to how we approach this website.

Our Commitment

We’re committed to a few simple standards:

  • Accuracy where evidence supports it — We build our tools around generally accepted concepts, not guesswork.
  • Clear methodology — We try to explain how our calculators work rather than presenting them as black boxes.
  • Honest limitations — We won’t overstate what our tools can do.
  • Regular improvement — As our understanding evolves, we aim to refine our tools and content accordingly.
  • Avoiding misleading precision — We’d rather present a reasonable estimate clearly than a falsely precise number that implies more certainty than exists.

Important Limitation

EtG Calculator Hub’s tools are educational and modeling resources only. They cannot determine an individual’s actual urine EtG concentration, cannot predict a specific laboratory result, and should not be used as a substitute for professional testing or advice. Calculator outputs are estimates based on general formulas, not measurements of any biological sample.

Contact

Have feedback about the website, run into a calculator issue, spotted something that needs correcting, or just have a general question? We’d like to hear from you. Please reach out through our contact page — we appreciate input that helps us keep EtG Calculator Hub clear, useful, and honest.