TFG CKD-EPI simplificada
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
About this calculator
The Simplified CKD-EPI eGFR calculator estimates glomerular filtration rate (GFR) using serum creatinine and patient age. It adapts the CKD-EPI formula, a standard tool for detecting kidney function decline in adults. The equation adjusts creatinine values (standardized to 0.9 mg/dL for females) and applies an age correction factor for accuracy.
The formula uses 141·(Cr/0.9)^-1.209·0.993^age, where Cr is serum creatinine. It is ideal for quick screening in clinical settings due to its simplicity, requiring no additional data like race or weight. Readings below 60 ml/min/1.73m² often indicate kidney damage, while 60-90 suggest mild reduction.
Use caution in specific populations such as elderly, obese individuals, or those with low muscle mass, as creatinine may underestimate GFR in these cases. Always consult a nephrologist for clinical interpretation. This tool does not replace comprehensive lab tests or professional evaluation.
Frequently asked questions
How does the calculator account for patient gender?
The formula uses a default creatinine reference of 0.9 mg/dL for females. Males must manually adjust creatinine values before calculation.
What age range is the calculation most accurate for?
Validated for adults aged 18-85. Results for younger or older populations may require additional interpretation.
Why doesn't it include race or body weight?
The simplified version prioritizes speed. Full CKD-EPI includes race, but this version reduces variables for quick screenings.
Can it be used for diabetic patients?
Yes, but diabetes may alter creatinine levels, requiring cross-checking with tests like albuminuria.