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Creatinine Clearance (CrCl) Calculator
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Estimate creatinine clearance (CrCl) with the Cockcroft–Gault equation using age, weight, sex, and serum creatinine.
This is Cockcroft–Gault estimated creatinine clearance (CrCl), not eGFR, and it cannot determine a CKD stage by itself.
For education only; not a diagnosis or dosing recommendation. Weight selection, creatinine assay, clinical stability, and the specific medicine label affect interpretation. Ask a clinician or pharmacist.
This calculator estimates creatinine clearance (CrCl) in mL/min using the Cockcroft–Gault equation and your age, weight, sex, and serum creatinine. Enter serum creatinine in mg/dL or μmol/L; values in μmol/L are converted using 1 mg/dL = 88.4 μmol/L.
Men: CrCl = ((140 − age) × weight in kg) ÷ (72 × serum creatinine in mg/dL).
Women: Multiply the result above by 0.85.
Cockcroft–Gault CrCl is not the same as eGFR, which is reported using standardized body surface area. KDIGO CKD GFR categories are based on GFR/eGFR, and a CKD diagnosis also requires duration and other evidence of kidney damage. Do not directly assign CKD stages 1–5 based on this calculator's CrCl result.
This result is for educational and calculation-checking purposes only. It is not medical diagnosis, prognosis, or dosing advice. Interpretation may vary based on the weight used, creatinine assay method, acute or unstable kidney function, age, and specific prescribing information. For treatment decisions or medication dosing, consult a physician or pharmacist who can review laboratory results and the drug label.
