- Estimated GFR
- 91.69 mL/min/1.73 m²
How it works
Keep the equation with the result
When comparing eGFR records, record the equation and creatinine units alongside each value. Switching equations can change the estimate even without a biological change; a clinician can interpret a trend using consistent methods.
Selecting an adult or pediatric kidney estimate
The adult and pediatric eGFR modes use different equations and required measurements. Select the appropriate method and verify the laboratory units before entering a result. An estimated filtration rate is not the same as a direct measurement and must be interpreted in clinical context. A single calculated value cannot by itself establish a diagnosis or determine treatment.
Adult CKD-EPI 2021: formula and assumptions
eGFR = 142 × min(Scr/κ,1)^α × max(Scr/κ,1)^−1.200 × 0.9938^age × 1.012 (female).
The 2021 CKD-EPI creatinine equation is race-free. Kidney function interpretation requires clinical context and evidence over time.
Pediatric bedside Schwartz: formula and assumptions
eGFR = 0.413 × height(cm) / creatinine(mg/dL).
The bedside Schwartz estimate is for pediatric use under clinical supervision; it is not the adult CKD-EPI equation.
Worked example
Using the Adult CKD-EPI 2021 example:
- Sex used by the equation
- Male
- Age (years)
- 50
- Serum creatinine (mg/dL)
- 1
- Creatinine unit
- mg/dL
eGFR = 142 × min(Scr/κ,1)^α × max(Scr/κ,1)^−1.200 × 0.9938^age × 1.012 (female).
Example result
Estimated GFR: 91.69 mL/min/1.73 m²
These are illustrative inputs. Change the values to explore a different scenario.
What to keep in mind
Results are estimates in mL/min/1.73 m². Do not diagnose kidney disease or change treatment from a calculator result.
Formula references
References explain the underlying methods; they do not imply endorsement or individual professional review of Finflo.
Common questions
Does one eGFR result diagnose kidney disease?
No. Interpretation requires clinical context and evidence over time. A calculator result should not be used alone to change treatment.
Can I use the adult equation for a child?
No. The pediatric mode uses the bedside Schwartz relationship with height and creatinine, under clinical supervision rather than the adult equation.
Prepared by Finflo. See our methodology and editorial policy. Read the relevant professional-advice limitations.