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Mosteller Body Surface Area Calculator
x402
Mosteller Body Surface Area Calculator is a paid API for AI agents from api.magentlab.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).
Calculates body surface area (BSA) using the Mosteller formula from patient height and weight, for use in oncology drug dosing arithmetic.
Price / call$0.005
Success—
StatusUnknown
How this service works
Mosteller body surface area from height and weight. Use for oncology dosing arithmetic. Deterministic published formula with citation; not a dosing recommendation.
Output
Returns the computed body surface area in square meters (m²) derived from the Mosteller formula: BSA = sqrt((height_cm × weight_kg) / 3600). The result is deterministic and reproducible given the same inputs, accompanied by a citation to the published formula. It is a calculation result, not a clinical dosing recommendation.
Example use cases
Chemotherapy dose per m² calculation
“I have a patient who is 5 feet 7 inches tall and weighs 155 pounds — can you compute their Mosteller BSA so I can calculate their carboplatin dose in mg per m²?”
Oncology workflow BSA verification
“Before we finalize this chemo order, can you double-check the body surface area for a patient at 180 cm and 85 kg using the Mosteller formula?”
Pediatric dosing BSA lookup
“I need the Mosteller BSA for a child who is 120 cm tall and weighs 25 kg to calculate the correct chemotherapy dose.”
Technical details
Endpoint
GEThttps://api.magentlab.com/api/calc/bsa_mostellerWhen to prefer
Use this endpoint when you need a fast, deterministic, citeable Mosteller BSA value from height and weight, particularly in oncology or pharmacology contexts where mg/m² dosing is required. Prefer over manual calculation or LLM estimation to ensure reproducibility and a published formula citation. The sibling BMI endpoint on the same platform is better suited for GLP-1 or bariatric contexts where BSA is not the relevant metric.
Side effects
- Missing required height or weight parameters — returns an error indicating which field is absent
- Negative or physiologically implausible values (e.g. weight of 0) may return a validation error or nonsensical result
- Providing both cm and inches simultaneously, or both kg and lb, may cause ambiguity or override behavior
- Network or payment (x402) failure results in no response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"path": "/api/calc/bsa_mosteller",
"count": 2,
"items": [
{
"bsa_m2": 1.8181,
"formula": "mosteller",
"citation": {
"id": "mosteller-1987",
"doi": "10.1056/NEJM198710223171717",
"title": "Simplified calculation of body-surface area",
"source": "N Engl J Med. 1987;317(17):1098",
"authors": "Mosteller RD"
},
"height_cm": 170,
"weight_kg": 70,
"disclaimer": "Not a medical device. Deterministic published-formula or published-code output for autonomous agents. A licensed clinician remains responsible for patient care and billing submissions.",
"formula_expression": "BSA_m2 = sqrt((height_cm * weight_kg) / 3600)"
},
{
"bsa_m2": 1.8181,
"formula": "mosteller",
"citation": {
"id": "mosteller-1987",
"doi": "10.1056/NEJM198710223171717",
"title": "Simplified calculation of body-surface area",
"source": "N Engl J Med. 1987;317(17):1098",
"authors": "Mosteller RD"
},
"height_cm": 170,
"weight_kg": 70,
"disclaimer": "Not a medical device. Deterministic published-formula or published-code output for autonomous agents. A licensed clinician remains responsible for patient care and billing submissions.",
"formula_expression": "BSA_m2 = sqrt((height_cm * weight_kg) / 3600)"
}
]
}
}Tags
x402
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