{"uid":"cap_-SZ1VLv_0f-qFNS208x-Y","slug":"cockcroft-gault-creatinine-clearance-calculator-a3d1d864","name":"Cockcroft-Gault Creatinine Clearance Calculator","description":"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.","url":"https://api.magentlab.com/api/calc/crcl_cockcroft_gault","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET","HEAD","DELETE"],"type":"string"},"headers":{"type":"object","additionalProperties":{"type":"string"}},"queryParams":{"type":"object","required":["age","sex"],"properties":{"age":{"type":"integer","description":"Age in years (18-120)."},"sex":{"enum":["female","male"],"type":"string","description":"female applies the published 0.85 factor; male does not."},"weight_kg":{"type":"number","description":"Total body weight in kilograms. Provide weight_kg or weight_lb."},"weight_lb":{"type":"number","description":"Total body weight in pounds. Converted as kg = lb * 0.45359237."},"creatinine_mg_dl":{"type":"number","description":"Serum creatinine in mg/dL. Provide this or creatinine_umol_l."},"creatinine_umol_l":{"type":"number","description":"Serum creatinine in µmol/L. Converted as mg/dL = µmol/L / 88.42."}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"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)"}]}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_Apy0aZnj1DQMXH4ICMmKs","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Calculates creatinine clearance (CrCl) using the Cockcroft-Gault formula from age, sex, weight, and serum creatinine","exampleAgentPrompt":"Calculate the Cockcroft-Gault creatinine clearance for a 68-year-old female weighing 72 kg with a serum creatinine of 1.4 mg/dL.","exampleUseCases":[{"title":"Renal dose adjustment before prescribing","prompt":"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?"},{"title":"CrCl check for a female patient with borderline creatinine","prompt":"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?"},{"title":"Convert creatinine units and compute CrCl","prompt":"For a 55-year-old male weighing 90 kg with a creatinine of 120 µmol/L, what is the Cockcroft-Gault CrCl estimate?"}],"resultDescription":"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.","failureModes":["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"],"whenToPreferThis":"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.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T01:02:41.624Z","isFirstParty":false}