CrCl for 80-Year-Old Male, 55 kg, SCr 2.0 mg/dL
An 80-year-old male weighing 55 kg with serum creatinine of 2.0 mg/dL has an estimated creatinine clearance of approximately 22 mL/min, indicating severe CKD.
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.
Assess significantly reduced kidney function in an elderly patient for critical medication dose adjustments.
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.