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Cockcroft-Gault Creatinine Clearance Calculator

This calculator estimates creatinine clearance (CrCl) using the Cockcroft-Gault equation. It helps assess kidney function based on age, weight, serum creatinine, and gender, making it a valuable tool in medication dosing and renal function monitoring.

Kidney Function Estimator Using Cockcroft-Gault Formula

Input Fields
years
Enter your age in years
kg
Enter your weight in kilograms
Enter your serum creatinine level
If enabled, the result will update automatically when you change any value.

Cockcroft-Gault Equation for Creatinine Clearance

Formula
$$\text{CrCl (Male)} = \frac{(140 – \text{age}) \times \text{weight (kg)}}{72 \times \text{Scr}}$$ $$\text{CrCl (Female)} = 0.85 \times \frac{(140 – \text{age}) \times \text{weight (kg)}}{72 \times \text{Scr}}$$

Where:

  • $$CrCl$$ = Creatinine Clearance (mL/min)
  • $$Age$$ = Patient’s age in years
  • $$Weight$$ = Body weight in kg
  • $$Scr$$ = Serum creatinine (mg/dL)
  • The formula for females includes a correction factor of 0.85


The Cockcroft-Gault equation is commonly used to estimate creatinine clearance, which reflects kidney filtration efficiency. It is especially useful in adjusting drug dosages for patients with impaired renal function. This formula considers age, body weight, and serum creatinine, with a gender-specific adjustment for females. It is a standard method in clinical pharmacology and nephrology for evaluating renal performance.

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