Alcohol Metabolism Calculator
The Alcohol Metabolism Calculator estimates peak blood alcohol content and the hours to clear it from your sex, body weight in kilograms, and number of standard drinks using the Widmark equation.
What this calculator does
The Alcohol Metabolism Calculator estimates your result instantly from the values you enter, using standard health & fitness formulas. The Alcohol Metabolism Calculator estimates peak blood alcohol content and the hours to clear it from your sex, body weight in kilograms, and number of standard drinks using the Widmark equation. Calculations run in your browser, so nothing you type is sent to a server, and the output is an estimate rather than a certified or official figure.
Result
About Alcohol Metabolism Calculator
This calculator applies the Widmark equation to estimate a peak blood alcohol content from body weight, sex, and the number of standard drinks, where each standard drink is treated as 14 grams of alcohol.
It also estimates how long that alcohol takes to clear, using a metabolism rate of 0.015 percent per hour.
Formula & Mathematical Calculation
Estimated Peak BAC = f(Sex, Body Weight (kg), Standard Drinks)
Calculated according to standard health formulas implemented in the calculator core.
Calculation Example
For a male weighing 75 kg after 3 standard drinks, the alcohol mass is 3 × 14 = 42 g and the distribution factor r is 0.68.
Peak BAC = 42 ÷ (75 × 1000 × 0.68) × 100 ≈ 0.082%. Dividing by 0.015 per hour gives about 5.5 hours to clear.
Key Benefits
- Applies the Widmark equation with sex-specific distribution factors (0.68 male, 0.55 female).
- Treats each standard drink as 14 grams of alcohol.
- Estimates hours to clear using a 0.015 percent-per-hour rate.
- Reports peak BAC to three decimal places.
How to Use this Calculator
-
Select sex
Choose Male or Female to set the distribution factor. -
Enter body weight
Type your body weight in kilograms. -
Enter standard drinks
Enter the number of standard drinks consumed. -
Calculate and read
Select Calculate and read the Estimated Peak BAC and Hours to Clear.
Assumptions & Limitations
What the calculation assumes
- Every value you enter is treated as an exact, known amount.
- Any rate or interval you enter is assumed to hold for the whole period unless the form asks for it separately.
- Results use standard published formulas and account only for the values entered above.
- Rounding is applied for display; the underlying calculation uses your full precision.
- Results are returned in the same units you enter, unless the tool states the output unit.
What it does not cover
- Alcohol Metabolism Calculator produces a calculated result for reference and learning, not a certified or official measurement.
- Real-world outcomes differ when tolerances, rounding rules or local standards apply.
- Definitions and standards vary by region and change over time; verify the convention that applies to your case.
- Figures are only as accurate as the inputs you supply — check them before acting on the result.
- For work where the result carries real consequences, confirm it against an authoritative source.
Frequently Asked Questions
Free to use, no account needed. Calculations run in your browser, so nothing you type is sent to a server. Results are estimates — how we build and check our calculators.