Creatinine Clearance Calculator
Estimate creatinine clearance using the Cockcroft-Gault relationship.
Creatinine Clearance measurements
Enter your values, then calculate.
Result
How to calculate creatinine clearance
The Cockcroft-Gault equation estimates creatinine clearance, a measure of kidney function, from age, weight, and serum creatinine.
How the calculation works
Creatinine clearance = ((140 − Age) × Weight) ÷ (72 × Serum creatinine). This version is for male patients; a correction factor of 0.85 is typically applied for female patients.
Example
A 60-year-old, 80 kg patient with serum creatinine 1.0 mg/dL: ((140−60)×80)÷(72×1.0) = 6,400÷72 ≈ 88.9 mL/min.
Frequently asked questions
How is Result calculated?
Result = ((140 − [Age]) × [Weight]) ÷ (72 × [Serum creatinine]).
Is the Creatinine Clearance Calculator free to use?
Yes — every calculator on Simple Calculator Tools is free, runs in your browser, and does not require an account.
Creatinine Clearance Calculator
Creatinine clearance = ((140 − Age) × Weight) ÷ (72 × Serum creatinine). This version is for male patients; a correction factor of 0.85 is typically applied for female patients.
Let's understand your creatinine clearance result.
Calculate a result above and this guide will help you interpret it using this calculator's own formula and explanation.
Pro Tips for Creatinine Clearance
- This formula requires a 0.85 correction factor multiplied at the end for female patients — check whether your specific tool applies this automatically.
- This is an estimate used clinically for drug dosing decisions and should be interpreted by a healthcare professional alongside other kidney function indicators.
Common Creatinine Clearance Mistakes to Avoid
- Applying the male formula to a female patient without the standard 0.85 correction factor, which would overestimate clearance.
When to Use This Calculator
The Cockcroft-Gault equation estimates creatinine clearance, a measure of kidney function, from age, weight, and serum creatinine.