Creatinine Clearance Calculator
Calculate creatinine clearance using the Cockcroft-Gault equation for renal function assessment and drug dose adjustment.
Medical Disclaimer
This calculator is for informational and educational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before making decisions about your health. Never disregard professional medical advice or delay seeking it because of results from this tool.
Inputs
CrCl declines ~1 mL/min/1.73 m² per year after age 40; CKD stage affects drug dosing
Normal: 0.7–1.3 mg/dL (male); 0.6–1.1 (female); CKD: >1.5 mg/dL sustained elevation
Results
Creatinine Clearance
82.6mL/min
How to Use This Calculator
- Enter patient age, weight (kg), serum creatinine (mg/dL), and sex.
- Review creatinine clearance (CrCl) in mL/min using the Cockcroft-Gault equation.
- Use CrCl to adjust renally cleared drug doses — many guidelines specify cutoffs at 30, 45, or 60 mL/min.
How the result changes with Serum Creatinine
| Serum Creatinine | Creatinine Clearance |
|---|---|
| 3.09 | 26.7mL/min |
| 11 | 7.5mL/min |
| 20 | 4.1mL/min |
| 27 | 3.1mL/min |
What each input means
- Age
- Patient age in years. Cockcroft-Gault equation: CrCl = [(140 − age) × weight × 0.85 (if female)] ÷ (72 × serum creatinine). Age is a key determinant — CrCl declines ~1 mL/min/yr after age 40.
- Weight
- Actual body weight in kilograms. Use ideal body weight for obese patients.
- Serum Creatinine
- Serum creatinine level in mg/dL. Normal range: 0.7–1.3 mg/dL (male), 0.6–1.1 mg/dL (female). Elevated creatinine indicates decreased glomerular filtration rate.
- Sex
- Biological sex. Females receive a 0.85 correction factor.
How this is calculated
Worked example, using the default values
- Identify Input Parameters4 parametersAge = 55, Weight = 70, Serum Creatinine = 1, Sex = 0 = 4 input(s) provided
- Calculate Creatinine ClearanceCreatinine Clearance82.6 = 82.6
- Calculate Adjusted CrClAdjusted CrCl78.6 = 78.6
- Calculate CKD Stage2 = 2
Engine last updated .
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