Cystatin C GFR Estimator (CKD-EPI Cys)

Estimate GFR using serum cystatin C with the CKD-EPI cystatin C equation. Less affected by muscle mass than creatinine-based equations.

Weight
Height
Clinical Guidance

BMI is a screening measure of body size, not a direct measure of body fat. The standard WHO categories are underweight (<18.5), normal (18.5–24.9), overweight (25–29.9), and obese (≥30).

BMI can overestimate body fat in athletes with high muscle mass and underestimate it in older adults with low muscle mass. Interpret it alongside waist circumference and clinical context rather than as a standalone diagnosis.

⚕ Clinical Disclaimer: These calculators are for educational and reference purposes only. Always verify results with qualified clinical judgment and current clinical guidelines. Do not use as a sole basis for medical decisions.
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How It Works

Estimate GFR using serum cystatin C with the CKD-EPI cystatin C equation. Less affected by muscle mass than creatinine-based equations

Each component has a specific meaning:

  • Serum cystatin C — The serum cystatin c recorded for the scenario being assessed.

Note: Interpret the cystatin c gfr result against the thresholds and context described above.

How to Use

Enter the serum cystatin C for the scenario you are assessing. Estimate GFR using serum cystatin C with the CKD-EPI cystatin C equation. Less affected by muscle mass than creatinine-based equations. Use the cystatin c gfr result to inform your calculation.

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Frequently Asked Questions