Your eGFR on the CKD scale
Higher is better. The pointer marks your eGFR; bands are the CKD stages.
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GFR Calculator
Estimate your kidney function (eGFR) from a serum creatinine test using the race-free CKD-EPI 2021 equation, and see the matching chronic kidney disease stage.
Estimated GFR
95 mL/min/1.73m²
Normal kidney function
CKD stage—
Interpretation—
How it works
Glomerular filtration rate (GFR) measures how well your kidneys filter waste from blood. It is estimated from serum creatinine, age, and sex using the 2021 CKD-EPI equation, which removed the race coefficient used in older versions.
CKD stages by eGFR
| Stage | eGFR | Meaning |
|---|---|---|
| G1 | 90+ | Normal |
| G2 | 60–89 | Mildly reduced |
| G3a / G3b | 30–59 | Moderately reduced |
| G4 | 15–29 | Severely reduced |
| G5 | Under 15 | Kidney failure |
Stages G1 and G2 are only considered chronic kidney disease if other markers of kidney damage are present.
Frequently asked questions
Is eGFR a diagnosis?
No. It is an estimate that supports diagnosis. A single result can be affected by hydration, muscle mass, and recent meals, so doctors look at trends and other tests.
Why did the race coefficient get removed?
The 2021 equation dropped the race adjustment to give a single, more equitable estimate for all adults. This calculator uses that updated formula.