Creatinine Clearance Calculator
Calculate creatinine clearance using the Cockcroft-Gault equation to assess kidney function
Calculate Creatinine Clearance
Age in years (1-120)
Sex affects the calculation coefficient
Current body weight
Height for BMI and weight adjustment calculation
Normal range: 0.7-1.3 mg/dL (62-115 µmol/L)
Creatinine Clearance Results
Cockcroft-Gault Formula: CrCl = (140 - age) × weight × sex / (72 × sCr)
Calculation: (140) × 0.0 × 1 / (72 × 0.00)
Medical Disclaimer
This calculator provides estimates based on the Cockcroft-Gault equation and should not replace professional medical advice. Kidney function assessment requires clinical interpretation alongside medical history and other laboratory findings. Always consult healthcare professionals for medical decisions and drug dosing adjustments.
Example Calculation
Case: 67-year-old Male Patient
Age: 67 years
Weight: 92 kg (BMI 30.74 - Obese)
Height: 173 cm
Serum Creatinine: 1.4 mg/dL
Sex: Male
Step-by-Step Calculation
1. Calculate IBW: 50 + 0.9 × (173 - 152) = 68.9 kg
2. Calculate ABW: 68.9 + 0.4 × (92 - 68.9) = 78.14 kg
3. Apply Cockcroft-Gault: (140 - 67) × 78.14 × 1 / (72 × 1.4)
Result: 56.6 mL/min
Interpretation: Moderately decreased kidney function (CKD Stage 3b)
CKD Stages Reference
Weight Adjustment
Understanding Creatinine Clearance
What is Creatinine Clearance?
Creatinine clearance (CrCl) is a measure of kidney function that estimates the glomerular filtration rate (GFR). It represents the volume of blood plasma cleared of creatinine per unit time, providing insight into how well the kidneys are filtering waste products.
Clinical Applications
- •Assessing kidney function in chronic kidney disease
- •Medication dosing adjustments for renally cleared drugs
- •Monitoring progression of kidney disease
- •Pre-operative assessment for surgery
Cockcroft-Gault Equation
CrCl = (140 - age) × weight × sex / (72 × sCr)
- CrCl: Creatinine clearance (mL/min)
- Age: Patient age in years
- Weight: Body weight (adjusted for BMI)
- Sex: 1 for males, 0.85 for females
- sCr: Serum creatinine (mg/dL)
Note: This calculator automatically adjusts weight based on BMI using established clinical guidelines to improve accuracy in underweight, normal weight, and obese patients.