Kidney biomarker tool
Cystatin C eGFR Calculator for Adult Kidney Function
Use cystatin C, age, and sex to estimate GFR when creatinine may be less reliable because of muscle mass or diet.
Cystatin C eGFR Calculator
This is an educational estimate for adults with stable kidney function. Discuss results and the most appropriate equation with a healthcare professional.
When is cystatin C useful?
Cystatin C is less dependent on muscle mass than creatinine. Clinicians may use it to confirm CKD, evaluate unusual body composition, or improve confidence before an important medication or treatment decision.