Pediatric GFR Calculator
The Pediatric GFR Calculator estimates eGFR based on serum creatinine, height, age, and gender. This tool helps medical professionals and parents monitor kidney health efficiently. Whether you are diagnosing chronic kidney disease, adjusting medication dosages, or investigating mild kidney function loss, this tool provides reliable results for informed clinical decisions.
How eGFR Is Calculated
eGFR measures how effectively the kidneys remove waste from the blood, normalized to the child's body size. This calculation uses the Bedside Schwartz equation, the standard method for assessing renal function in pediatric patients.
eGFR = (k × Height) / Serum Creatinine
Where:
- k = Constant based on age and gender (e.g., 0.413 for children, 0.455 for adolescents)
- Height = Child's height in centimeters
- Serum Creatinine = Waste product level in blood (mg/dL)
First, the formula determines the "k" constant based on the child's age and gender to account for muscle mass development. Then, it multiplies this constant by the child's height to scale the result to body size. Finally, it divides by the serum creatinine level to estimate the filtration rate. This method ensures accuracy across different stages of childhood growth.
What Your eGFR Means
An eGFR value indicates the rate at which blood is filtered through the kidneys, helping assess overall organ health. This score is vital for detecting early signs of kidney stress before physical symptoms appear.
Result Categories
Normal or high (90+): Kidneys are functioning well. No specific medical intervention is typically needed.
Mildly decreased (60–89): Suggests mild loss of function. Further testing is often recommended to identify the cause.
Moderately decreased (30–59): Indicates moderate kidney damage. Medical management is usually required to prevent progression.
Kidney failure (<15): Signifies severe loss of function. Advanced medical care, such as dialysis, is often necessary.
Pro Tip
A single low result does not always mean permanent damage. Factors like dehydration or illness can temporarily affect creatinine levels. Re-testing is often advised.
This calculator is for informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a pediatrician or nephrologist for accurate interpretation and care.
Tracking eGFR trends over time provides a much clearer picture of kidney health than relying on a single isolated result.