24 Hour Creatinine Clearance Calculation

Introduction: The 24 Hour Creatinine Clearance Calculator is a valuable tool for healthcare professionals and individuals who need to estimate the creatinine clearance rate, an important indicator of kidney function. Creatinine clearance is calculated based on age, weight, serum creatinine level, and urine volume over a 24-hour period.

Formula: The creatinine clearance is calculated using the Cockcroft-Gault formula: \text{Creatinine Clearance} = \left( \frac{{140 – \text{Age}} \times \text{Weight}}}{{\text{Serum Creatinine} \times \text{Urine Volume}}} \right)

How to Use:

  1. Enter the age in years.
  2. Input the weight in kilograms.
  3. Enter the serum creatinine level in mg/dL.
  4. Input the 24-hour urine volume in mL.
  5. Click the “Calculate” button to obtain the creatinine clearance rate.
  6. The result will be displayed below the button.

Example: If a 40-year-old individual with a weight of 70 kg, serum creatinine level of 1.2 mg/dL, and 24-hour urine volume of 1200 mL uses the calculator, the result will be “Creatinine Clearance: 95.83 mL/min.”


  1. Q: What is creatinine clearance, and why is it important? A: Creatinine clearance is a measure of the kidney’s ability to filter and remove creatinine from the blood. It is an important indicator of kidney function.
  2. Q: How often should creatinine clearance be measured? A: The frequency of creatinine clearance measurements depends on individual health conditions. It is often assessed in patients with kidney diseases or those taking medications affecting kidney function.
  3. Q: Can this calculator be used for children? A: The Cockcroft-Gault formula is generally applicable to adults. Pediatric creatinine clearance calculations may require different formulas.
  4. Q: What is a normal creatinine clearance rate? A: Normal values vary, but a typical range is approximately 90 to 120 mL/min. Values outside this range may indicate kidney dysfunction.
  5. Q: Does this calculator account for other factors affecting kidney function? A: This calculator specifically uses the Cockcroft-Gault formula. Comprehensive kidney function assessments may require additional tests and clinical evaluation.

Conclusion: The 24 Hour Creatinine Clearance Calculator is a useful tool for estimating creatinine clearance, providing insights into kidney function. Healthcare professionals can use this calculator as part of the assessment of renal health, helping to guide treatment decisions and monitor kidney function over time.

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