eGFR Calculator Kidney Health

Kidney Health eGFR Equation:

\[ eGFR = 142 \times \min(Scr/\kappa, 1)^\alpha \times \max(Scr/\kappa, 1)^{-1.200} \times 0.9938^{age} \times (1.012 \text{ if female}) \]

Estimated GFR (eGFR):

Unit Converter ▲

Unit Converter ▼

From:	To:

1. What is the Kidney Health eGFR Equation?

The Kidney Health eGFR equation estimates glomerular filtration rate (GFR) from serum creatinine, age, and sex. This specialized equation provides accurate assessment of kidney function for general health monitoring and kidney disease screening.

2. How Does the Calculator Work?

The calculator uses the Kidney Health eGFR equation:

\[ eGFR = 142 \times \min(Scr/\kappa, 1)^\alpha \times \max(Scr/\kappa, 1)^{-1.200} \times 0.9938^{age} \times (1.012 \text{ if female}) \]

Where:

\( Scr \) — Serum creatinine (mg/dL)
\( \kappa \) — 0.7 (female) or 0.9 (male)
\( \alpha \) — -0.241 (female) or -0.302 (male)
\( age \) — Age in years
1.012 — Female multiplier

Explanation: The equation accounts for the non-linear relationship between creatinine and GFR, with optimized coefficients for different demographic groups to provide accurate kidney function assessment.

3. Importance of eGFR Calculation

Details: Regular eGFR monitoring is essential for early detection of kidney dysfunction, assessing overall kidney health, and preventing progression of kidney disease through timely intervention.

4. Using the Calculator

Tips: Enter serum creatinine in mg/dL, age in years, and select gender. Ensure all values are valid (creatinine > 0, age between 1-120 years) for accurate results.

5. Frequently Asked Questions (FAQ)

Q1: What makes this equation different from others?
A: This equation uses optimized coefficients (142, -1.200, 0.9938) specifically calibrated for general kidney health assessment across diverse populations.

Q2: What are optimal eGFR values for kidney health?
A: Values ≥90 mL/min/1.73m² indicate healthy kidney function. Values between 60-89 suggest mild reduction, while below 60 may indicate kidney disease.

Q3: How often should eGFR be checked?
A: Annual screening is recommended for adults with risk factors (diabetes, hypertension, family history). Otherwise, every 2-3 years for general health monitoring.

Q4: Can diet affect creatinine levels?
A: Yes, high protein intake, especially red meat, can temporarily increase creatinine levels. Fasting or consistent diet before testing provides more reliable results.

Q5: When should I consult a doctor about my eGFR?
A: Consult if eGFR is consistently below 60, shows rapid decline, or if you have symptoms like swelling, fatigue, or changes in urination patterns.