Blood Alcohol Content Estimator (Widmark Formula)
Estimate blood alcohol content using the Widmark formula from grams of alcohol consumed, body weight, and time.
Formula and method
This calculator computes Estimated BAC directly in your browser without sending data to an external server.
Mathematical formula
- Estimated BAC:
Math.max(0, (alcoholGrams ÷ (weightKg × 1000 × genderConstant)) × 100 - 0.015 × hoursElapsed)
Variables and parameters
- Alcohol consumed (alcoholGrams): default value 28 g.
- Body weight (weightKg): default value 75 kg.
- Distribution ratio (male≈0.68, female≈0.55) (genderConstant): default value 0.68.
- Hours since drinking began (hoursElapsed): default value 2 hours.
Some formulas are undefined for certain input combinations (such as division by zero or logarithms of non-positive numbers). In those cases the live tool displays an alert instead of NaN.
Embed this tool
Paste this snippet into your own site or blog post to embed a live, working copy of this tool. It links back to the full page on SpecWhale.
Frequently asked questions
What equation and variables does Blood Alcohol Content Estimator (Widmark Formula) use?
Blood Alcohol Content Estimator (Widmark Formula) evaluates outputs such as <strong>Estimated BAC</strong> based on inputs including Alcohol consumed, Body weight, Distribution ratio (male≈0.68, female≈0.55), Hours since drinking began. Check the Mathematical Method section for the explicit formula.
What should I keep in mind when interpreting Blood Alcohol Content Estimator (Widmark Formula) metrics?
Health and body calculators provide general estimates derived from standard population equations. Individual physiological differences (such as muscle mass or hydration) can alter personal results.
What happens if I enter invalid or zero values into Blood Alcohol Content Estimator (Widmark Formula)?
If an input combination is mathematically undefined (such as division by zero or negative square roots), SpecWhale alerts you gracefully rather than returning invalid NaN outputs.
Are my calculations in Blood Alcohol Content Estimator (Widmark Formula) saved or private?
All calculations are 100% private and run locally in your Web browser. Your numbers are never uploaded to any server, but can be saved locally to your device or exported as CSV/JSON.
Is Blood Alcohol Content Estimator (Widmark Formula) free to use?
Yes. Blood Alcohol Content Estimator (Widmark Formula) is completely free, has no usage limit, and does not require an account, email, or API key.
Does Blood Alcohol Content Estimator (Widmark Formula) store or upload my data?
No. Blood Alcohol Content Estimator (Widmark Formula) calculates everything locally in your browser. Nothing you type is sent to a server or stored by SpecWhale.
How accurate is Blood Alcohol Content Estimator (Widmark Formula)?
Blood Alcohol Content Estimator (Widmark Formula) uses a standard formula (see the Method section above for the exact expression). For high-stakes financial, medical, or legal decisions, confirm the result with a professional or an authoritative source before relying on it.
Can I embed Blood Alcohol Content Estimator (Widmark Formula) on my own website?
Yes. Use the "Embed this tool" snippet on this page to add a free, working copy of Blood Alcohol Content Estimator (Widmark Formula) to your own blog post or page.