Kidney function education
Pediatric eGFR Calculator: Bedside Schwartz
Estimate pediatric indexed GFR from height and standardized serum creatinine using the 2009 CKiD bedside Schwartz equation.
Online eGFR Calculator from Creatinine, Age & Sex (CKD-EPI 2021)
Enter serum creatinine, age, and sex to calculate eGFR online and estimate your kidney function using the current CKD-EPI 2021 equation.
Enter Your Values
Enter serum creatinine and height to calculate pediatric GFR using the Bedside Schwartz equation.
Method and equation
The equation is eGFR = 0.413 × H ÷ SCr, where H is measured height in centimeters and SCr is creatinine in mg/dL. Creatinine in µmol/L is divided by 88.4 first. The result is in mL/min/1.73 m². The equation was developed primarily in children ages 8–15 with mild-to-moderate CKD, rather than as a screening tool for every healthy child.
eGFR = 0.413 × H / SCr
How to use this tool
- Select the pediatric tab. Enter a recent measured height and serum creatinine from the same clinical period, choosing the unit exactly as printed on the report. Review the estimate alongside the laboratory's pediatric result and growth history.
- Review the original report, earlier results and relevant urine tests with a qualified clinician before making a care decision.
Worked example
For height 120 cm and creatinine 0.5 mg/dL, 0.413 × 120 ÷ 0.5 gives 99.12 mL/min/1.73 m², displayed as 99. Creatinine 44.2 µmol/L is equivalent to 0.5 mg/dL.
Understanding the result
This is an estimate of filtration indexed to standard body size. Interpretation depends on age, growth, diagnosis and trends. NIDDK also describes CKiD U25 equations for ages 1–25; the treating team should select the appropriate equation.
Limitations and safety
- Less accurate at high GFR. Extra caution is needed in infants, unusual body composition, non-standardized assays and rapidly changing kidney function. Adult CKD-EPI equations and adult interpretation must not simply be applied to children.
- Educational use only. A result cannot diagnose disease or choose a medicine dose. Do not delay urgent care for symptoms or rapidly changing kidney results.
Sources
Method and explanations checked against the sources below on October 14, 2026. This is editorial and technical verification, not a physician review. External sources may be in English.