Kidney FunctionUpdated 2025-12-24Medically Reviewed
eGFR (Estimated Glomerular Filtration Rate)
Everything you need to know about eGFR (Estimated Glomerular Filtration Rate) levels, including what normal ranges look like and what abnormal results might indicate.
Standard Reference Range
Unit: mL/min/1.73m²Male Reference Range
≥90 (normal) mL/min/1.73m²
Female Reference Range
≥90 (normal) mL/min/1.73m²
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Reference ranges may vary slightly between laboratories. Always consult your doctor for interpretation.
What is eGFR?
eGFR estimates how well the kidneys filter waste and fluids. It is calculated from serum creatinine plus age, sex, and sometimes race or cystatin C.
Key Takeaway
eGFR ＜60 for over 3 months suggests chronic kidney disease; rapid drops indicate acute kidney injury.
Why is this test performed?
- Screen and stage chronic kidney disease (CKD)
- Adjust medication doses cleared by the kidneys
- Monitor diabetes or hypertension complications
Interpreting Your Results
- ≥90: Normal (if no other kidney damage markers)
- 60–89: Mildly decreased; watch trends
- 45–59 / 30–44 / 15–29: CKD stages 3a/3b/4
- ＜15: Kidney failure (stage 5)
Related Tests
- Creatinine/BUN: Inputs and cross-checks
- Potassium: Rises when kidney function declines
- Uric Acid: Often elevated in CKD
Decode your Estimated GFR Results
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