Creatinine Clearance for 65-Year-Old Male, 70 kg, SCr 1.0
A 65-year-old male weighing 70 kg with a serum creatinine of 1.0 mg/dL has an estimated creatinine clearance of approximately 68 mL/min.
How to use this tool
- Enter age in years and body weight in kilograms.
- Enter serum creatinine in mg/dL.
- Select sex to apply the 0.85 factor for females.
- Read the estimated creatinine clearance and category.
Estimate kidney function using the Cockcroft-Gault formula for a typical elderly male patient.
Frequently asked questions
- What is a normal creatinine clearance?
- A CrCl of roughly 90 mL/min or above is generally considered normal for adults, though it declines naturally with age. Lower values suggest reduced kidney filtration.
- Which weight should I enter?
- Cockcroft-Gault was derived with actual body weight, but clinicians often use ideal or adjusted weight for very lean or heavier patients to avoid over- or underestimating clearance.
- Is creatinine clearance the same as eGFR?
- They are related but not identical. Cockcroft-Gault CrCl is still used for drug dosing, while eGFR equations like CKD-EPI are preferred for staging chronic kidney disease.