How it works
Adult mode uses the 2021 CKD-EPI creatinine equation. Pediatric and young-adult mode uses the CKiD U25 creatinine equation with age- and sex-specific coefficients.
Input query strings and outputs
Use an input name in this page’s URL as ?name=value, and join additional inputs with &. Portable shared links may instead use the compact ?ac= state parameter.
Input query strings
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?ageGroup=Equation populationChoice · Required · Default: adult · Accepted values: adult, pediatric
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?age=AgeNumber · Required · Default: 50
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?sex=Sex used by equationChoice · Required · Default: male · Accepted values: male, female
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?creatinineUnit=Serum creatinine unitChoice · Required · Default: mgdl · Accepted values: mgdl, umol
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?creatinine=Serum creatinineNumber · Required · Default: 1
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?heightCm=Height for CKiD U25Number · Required · Default: 140 · Used when ageGroup = pediatric
Outputs
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egfrEstimated GFRNumber · Primary output · Suffix: mL/min/1.73 m²
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categoryGFR categoryText
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equationEquation usedText
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creatinineMgDlCreatinine usedNumber · Suffix: mg/dL
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interpretationInterpretation noteText
Interpretation limit
A single eGFR result cannot diagnose chronic kidney disease. Trends, urine albumin, laboratory standardization, medicines, muscle mass, and clinical context matter.