eGFR Calculator

Formula

The formula to calculate eGFR is:

\[ \text{eGFR} = 142 \times \min\left(\frac{\text{Scr}}{\kappa}, 1\right)^{\alpha} \times \max\left(\frac{\text{Scr}}{\kappa}, 1\right)^{-1.200} \times 0.993^{\text{Age}} \times 1.012 \, (\text{if female}) \]

Where:

\( \text{Scr} \) is the serum creatinine level in mg/dL.
\( \kappa \) is 0.7 for females and 0.9 for males.
\( \alpha \) is -0.241 for females and -0.302 for males.
\( \text{Age} \) is the patient's age in years.

Example

Let's say the serum creatinine is 1.2 mg/dL, the age is 45 years, and the gender is male. Using the formula:

\[ \text{eGFR} = 142 \times \min\left(\frac{1.2}{0.9}, 1\right)^{-0.302} \times \max\left(\frac{1.2}{0.9}, 1\right)^{-1.200} \times 0.993^{45} \approx 74.82 \text{ mL/min/1.73m²} \]

So, the eGFR is approximately 74.82 mL/min/1.73m².

What is eGFR?

The estimated Glomerular Filtration Rate (eGFR) is a measure of how well your kidneys are filtering blood. It is used to assess kidney function and diagnose chronic kidney disease (CKD).