Estimate your Glomerular Filtration Rate to assess kidney function.
The Glomerular Filtration Rate (GFR) measures how well your kidneys filter waste from your blood. This calculator uses the CKD-EPI 2021 race-free equation — the latest standard recommended by KDIGO — to estimate your eGFR from a serum creatinine blood test result. It then classifies your kidney function into the appropriate CKD stage (1–5).
CKD-EPI 2021 Equation
Uses the latest race-free equation recommended by KDIGO for the most accurate eGFR estimation.
CKD Stage Classification
Automatically classifies your result into stages 1 through 5 with clear descriptions.
Dual Creatinine Units
Accepts creatinine in mg/dL or µmol/L with automatic conversion.
Reference Table
See all CKD stages at a glance with your current stage highlighted.
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