Pediatric GFR Calculator (Bedside Schwartz)
Enter height and serum creatinine to calculate estimated GFR in children using the validated Bedside Schwartz formula.
Use the Pediatric GFR Calculator (Bedside Schwartz)
Patient Measurements
Enter height and serum creatinine to calculate eGFR.
Valid range: 1–16 years of age. Typically 50–200 cm.
Must use IDMS-traceable (enzymatic) creatinine assay.
Schwartz GJ et al. JASN 2009;20(3):629–637. Validated for ages 1–16.
Enter height and creatinine, then click Calculate.
| Stage | eGFR (mL/min/1.73 m²) | Description |
|---|---|---|
| G1 | ≥90 | Normal or high |
| G2 | 60–89 | Mildly decreased |
| G3a | 45–59 | Mild-to-moderate decrease |
| G3b | 30–44 | Moderate-to-severe decrease |
| G4 | 15–29 | Severely decreased |
| G5 | <15 | Kidney failure |
For educational use only. eGFR is an estimate, not a measured value. All clinical decisions must be made by a qualified healthcare professional based on the full patient context.
Summary
The Bedside Schwartz formula estimates glomerular filtration rate (eGFR) in pediatric patients using height in centimeters and serum creatinine in mg/dL: eGFR = 0.413 × height(cm) / SCr(mg/dL). Validated for children aged 1–16 years, it replaced the original Schwartz formula in 2009 after the IDMS-traceable creatinine assay became standard. The result is expressed in mL/min/1.73 m² and used to classify chronic kidney disease (CKD) stages and guide nephrology referral.
How it works
- Enter the child's height in centimeters (or switch to inches for automatic conversion).
- Enter the serum creatinine value in mg/dL from a standard laboratory report.
- The calculator applies the Bedside Schwartz equation: eGFR = 0.413 × height(cm) ÷ SCr(mg/dL).
- The result in mL/min/1.73 m² is mapped to the KDIGO CKD staging system (G1–G5).
- Review the interpretation and clinical note to guide next steps.
Use cases
- Bedside estimation of kidney function during pediatric nephrology rounds.
- Screening for chronic kidney disease in children with diabetes, hypertension, or structural renal anomalies.
- Dosage adjustment calculations for renally-cleared medications in pediatric patients.
- Monitoring kidney function over time in children on nephrotoxic therapies.
- Medical education and training on pediatric renal physiology.
- Pre-operative renal function assessment in pediatric surgical patients.