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Cockcroft-Gault Creatinine Clearance Calculator
x402
Cockcroft-Gault Creatinine Clearance 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 creatinine clearance (CrCl) using the Cockcroft-Gault formula from age, sex, weight, and serum creatinine
Price / call$0.005
Success—
StatusUnknown
How this service works
Cockcroft-Gault creatinine clearance from age, sex, total body weight, and creatinine. Use when a label still doses on CrCl rather than CKD-EPI eGFR. Deterministic published formula with citation; not a dosing recommendation.
Output
Returns the estimated creatinine clearance in mL/min computed via the Cockcroft-Gault formula, incorporating the 0.85 sex correction factor for females. Includes the citation for the published formula and a note that this is not a dosing recommendation.
Example use cases
Renal dose adjustment before prescribing
“I need to dose vancomycin for a 74-year-old male, 85 kg, with a serum creatinine of 1.8 mg/dL — can you calculate his Cockcroft-Gault CrCl so I know which dosing tier to use?”
CrCl check for a female patient with borderline creatinine
“My patient is a 62-year-old woman weighing 58 kg and her creatinine came back at 1.2 mg/dL. What's her Cockcroft-Gault creatinine clearance?”
Convert creatinine units and compute CrCl
“For a 55-year-old male weighing 90 kg with a creatinine of 120 µmol/L, what is the Cockcroft-Gault CrCl estimate?”
Technical details
Endpoint
GEThttps://api.magentlab.com/api/calc/crcl_cockcroft_gaultWhen to prefer
Use this endpoint when a drug label or clinical guideline specifically references CrCl (Cockcroft-Gault) for dosing thresholds rather than CKD-EPI eGFR. Ideal for agents automating medication dosing checks, pharmacy prior-authorization workflows, or clinical decision support where a deterministic, citable formula is required. Prefer over CKD-EPI when the label explicitly calls for CrCl or when the patient's actual body weight is the appropriate weight basis.
Side effects
- Missing required fields (age or sex) returns a validation error
- Age outside 18-120 range may be rejected or flagged
- Providing neither weight_kg/weight_lb nor creatinine values returns an error
- Implausibly extreme values (e.g. creatinine 0 or weight 0) may produce invalid results
- Unit mismatch (e.g. entering µmol/L as mg/dL) produces a silently wrong result if wrong field used
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"path": "/api/calc/crcl_cockcroft_gault",
"count": 2,
"items": [
{
"sex": "female",
"units": "mL/min",
"formula": "cockcroft_gault",
"citation": {
"id": "cockcroft-1976",
"doi": "10.1159/000180580",
"title": "Prediction of creatinine clearance from serum creatinine",
"source": "Nephron. 1976;16(1):31-41",
"authors": "Cockcroft DW, Gault MH"
},
"age_years": 65,
"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.",
"crcl_ml_min": 56.3,
"weight_basis": "total_body_weight",
"creatinine_mg_dl": 1.1,
"formula_expression": "CrCl_mL_min = ((140 - age) * weight_kg * (0.85 if female else 1)) / (72 * Scr_mg_dL)"
},
{
"sex": "female",
"units": "mL/min",
"formula": "cockcroft_gault",
"citation": {
"id": "cockcroft-1976",
"doi": "10.1159/000180580",
"title": "Prediction of creatinine clearance from serum creatinine",
"source": "Nephron. 1976;16(1):31-41",
"authors": "Cockcroft DW, Gault MH"
},
"age_years": 65,
"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.",
"crcl_ml_min": 56.3,
"weight_basis": "total_body_weight",
"creatinine_mg_dl": 1.1,
"formula_expression": "CrCl_mL_min = ((140 - age) * weight_kg * (0.85 if female else 1)) / (72 * Scr_mg_dL)"
}
]
}
}Tags
x402
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