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Pediatric Renal Function (eGFR) Calculator

Change all to SI units?:


Does your lab use creatinine methods recalibrated to be traceable to IDMS? What is this?


eGFR per Schwartz:
eGFR per Counahan-Barratt:

Assumptions for the use of this Pediatric estimated Glomerular Filtration Rate (eGFR) Calculator:
  • Used only as an estimate of GFR in children and adolescents. If you are looking for the adult creatinine clearance or glomerular filtration rate calculators please click here
  • Renal function is basically stable (i.e., not in acute renal failure) 
  • You know if your institution or lab has changed to measuring creatinine assays that IDMS traceable or not. If you are not sure or cannot find out, then leave the box unchecked. If you want to know more about this please click here
Formulas Used:
Original Schwartz Equations:

  • eGFR = k x (height in cm) ÷ serum Cr
  • k = 0.33 in preemie infants
  • k = 0.45 in term infants to 1 year of age
  • k = 0.55 in children to 13 years of age
  • k = 0.70 in adolescent males (females remain at 0.55 after age 13 years)
IDMS-Traceable Schwartz Equation:
  • eGFR = (0.41 x height in cm) ÷ serum Cr
Counahan-Barratt Equation:
  • eGFR = (0.43 x height in cm) ÷ serum Cr