CrCl Calculator
The Creatinine Clearance calculator uses the Cockcroft-Gault equation to estimate renal function for medication dosing. It remains the gold standard for drug dose adjustments in many clinical settings.
Calculator
LiveNormal: 0.7-1.3 mg/dL
Use actual body weight
Enter values to see your result.
How to Use the Calculator
- Enter serum creatinine level.
- Enter patient age, weight, and sex.
- View creatinine clearance result instantly.
What the CrCl Result Means
Creatinine clearance estimates kidney function for drug dosing purposes. Normal CrCl is typically >90 mL/min. Lower values indicate reduced renal function and may require medication dose adjustments. Many drug labels specifically reference CrCl thresholds for dosing recommendations.
When to Use This Calculator
- Dosing renally-cleared medications (e.g., vancomycin, aminoglycosides)
- Adjusting anticoagulant doses (e.g., DOACs, enoxaparin)
- Chemotherapy dose calculations
- Contrast dye administration risk assessment
Frequently Asked Questions
When should I use CrCl vs eGFR?
Use CrCl (Cockcroft-Gault) when drug dosing guidelines specifically recommend it, as most pharmacokinetic studies used this equation. Use eGFR for CKD staging and disease monitoring.
Should I use actual or ideal body weight?
Use actual body weight in most cases. For obese patients (>130% ideal body weight), consider using adjusted body weight. For underweight patients, use actual weight to avoid overestimating renal function.