Pediatric GFR Calculator

Your details

Standing height of the child.
cm
Measured serum or plasma creatinine. Use an IDMS-calibrated assay result for the 2009 bedside formula.
mg/dL
Determines the K coefficient in the original 1976 Schwartz formula.
Only affects the K coefficient for adolescents (K = 0.70 for males, 0.55 for females).
eGFR (Bedside 2009)Mildly decreased GFR (G2)
82.6mL/min/1.73 m²

Revised Schwartz (2009) - preferred for IDMS-calibrated creatinine

eGFR (Original 1976)110mL/min/1.73 m²
KDIGO CKD stageG2 - Mildly decreased
K coefficient used0.55
82.6 mL/min/1.73 m²
G5 - Failure<15G4 - Severe15-30G3b - Mod-severe30-45G3a - Mild-mod45-60G2 - Mild60-90G1 - Normal90+

Pediatric eGFR is 82.6 mL/min/1.73 m² - G2 - Mildly decreased.

  • The revised 2009 bedside formula gives eGFR 82.6 mL/min/1.73 m² (KDIGO G2 - Mildly decreased).
  • The original 1976 Schwartz formula (K = 0.55) gives 110.0 mL/min/1.73 m², a clinically meaningful difference due to assay calibration.
  • GFR is mildly reduced. Repeat measurement and clinical context are needed before a CKD diagnosis.
  • eGFR is an estimate. Body surface area, muscle mass, hydration status, and assay calibration all affect accuracy. Confirm with measured GFR (iohexol or inulin clearance) when precision is critical.

Next stepIf CKD is suspected, recheck eGFR in 3 months and assess for albuminuria, hypertension, and underlying cause.

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