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magent Estimated Blood Ethanol Concentration (BAC) Calculator
x402
magent Estimated Blood Ethanol Concentration (BAC) Calculator is a paid API for AI agents from api.magentlab.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).
Estimates fasting blood alcohol concentration using Watson 1981 TBW and sex-specific body composition parameters from ingested ethanol grams.
Price / call$0.005
Success—
StatusUnknown
How this service works
Fasting Watson 1981 theoretical Co from ingested ethanol grams and sex-specific Watson 1980 total body water. Blood-water fraction 0.80; absorbed fraction 1. Fasting Widmark-type estimate only. Ethanol only; not a medicolegal BAC or treatment dose.
Output
Returns a computed fasting blood ethanol concentration estimate derived from the Watson 1981 formula using sex-specific total body water (Watson 1980), a blood-water fraction of 0.80, and full absorption assumption. Output is a theoretical BAC value suitable for research or educational use only, not for medicolegal or clinical treatment decisions.
Example use cases
Research dose modeling for ethanol study
“I'm designing a pharmacokinetics study. What would the estimated fasting BAC be for a 28-year-old female, 165 cm tall, weighing 62 kg, who consumed 28 grams of ethanol?”
Nutrition app alcohol tracker estimate
“A user in our app is male, age 45, 175 cm, 90 kg, and drank about 56 grams of ethanol tonight. Can you estimate their theoretical blood alcohol concentration using the Watson 1981 model?”
Educational BAC illustration for health class
“For a health education demo, what is the estimated BAC for a 22-year-old male who is 5 feet 11 inches tall, weighs 160 pounds, and consumed 14 grams of ethanol — roughly one standard drink?”
Technical details
Endpoint
GEThttps://api.magentlab.com/api/calc/estimated_ethanolWhen to prefer
Use this endpoint when you need a fast, theoretically grounded fasting BAC estimate based on ingested ethanol grams and anthropometric inputs (sex, age, height, weight) using the Watson 1981/1980 methodology. Prefer it for research modeling, educational demonstrations, or app features requiring a pharmacokinetic BAC approximation. Do not use for medicolegal BAC determination, clinical dosing, or post-absorption scenarios.
Side effects
- Missing required fields (sex, age, ethanol_g) returns a 400 validation error
- Neither height_cm/height_in nor weight_kg/weight_lb provided causes computation failure
- Out-of-range values (e.g. age <18, ethanol_g >500) may return errors or undefined results
- Payment not provided or insufficient USDC results in 402 Payment Required
- Incorrect sex enum value (not 'male' or 'female') returns validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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