Interpret Your Estimated Glomerular Filtration Rate Results
Enter your eGFR value below and get an instant, free AI interpretation — a plain-English explanation checked against WHO/IFCC reference ranges.
Medical Disclaimer
This AI-generated interpretation is for educational purposes only and does not constitute medical advice, diagnosis, or treatment. Results may vary based on individual health factors not captured here.
Always consult a qualified healthcare professional before making any health decisions. Read full disclaimer →
Estimated Glomerular Filtration Rate Normal Ranges
eGFR estimates the volume of blood filtered by the kidneys per minute, calculated from serum creatinine, age, sex, and race.
| Age Group | Reference Range | Unit | Notes |
|---|---|---|---|
| Adults (18–64) | 90 – 120 | mL/min/1.73m² | CKD G1 (normal or high) ≥90 |
| Adults (18–64) | 60 – 89 | mL/min/1.73m² | CKD G2 (mildly decreased) |
| Elderly (65+) | 45 – 90 | mL/min/1.73m² | Physiologically declines ~1 mL/min/year after age 40 |
Critical (Panic) Values
Critical Low: < 15 mL/min/1.73m². Values outside these limits require immediate clinical attention.
Why Doctors Order the Estimated Glomerular Filtration Rate Test
eGFR is the primary measure used to detect, stage, and monitor chronic kidney disease. It also guides drug dosing adjustments — many medications accumulate to toxic levels when eGFR is below 30–60 mL/min (metformin, certain antibiotics, direct anticoagulants, contrast dye).
How to Enter Your eGFR Result
Enter your eGFR value in mL/min/1.73m², exactly as shown on your lab report.
Reference ranges for eGFR differ by age group, so entering your age gives a more accurate reading.
What a Low or High eGFR Can Be Associated With
Below the reference range
- Chronic kidney disease (diabetes, hypertension most common causes)
- Acute kidney injury
- Glomerulonephritis
- Polycystic kidney disease
- Nephrotoxic medications (NSAIDs, contrast, aminoglycosides)
Above the reference range
- High muscle mass (more creatinine production, formula may overestimate)
- Hyperfiltration in early diabetes or pregnancy
This interpreter flags a result at or below 15 mL/min/1.73m² as a critical value. Results that extreme are uncommon — contact your doctor promptly, and seek urgent medical care if you feel unwell.
These are common associations, not a diagnosis. A single result is read alongside your symptoms, history and other tests — discuss it with your doctor.
What Can Change Your eGFR Result
Before you read too much into a result, consider whether any of these applied:
- Muscle mass (high muscle mass → higher creatinine → lower eGFR estimate)
- Amputation or muscle-wasting disease (low creatinine → overestimates eGFR)
- Race/ethnicity (CKD-EPI 2021 equation removed race coefficient — now race-free)
- Acute changes in kidney function (eGFR lags behind creatinine changes)
Preparing for the test: No special preparation for the blood draw. Avoid creatine supplements and high meat intake the day before.
Symptoms That Often Prompt eGFR Testing
- Often none in early CKD (eGFR 45–90)
- Fatigue, swelling (eGFR 15–45)
- Nausea, vomiting, confusion (eGFR <15)
- Reduced urine output
- Foamy urine (if proteinuria present)
Want the full clinical guide to Estimated Glomerular Filtration Rate?
Reference ranges, causes, symptoms, preparation, and FAQs.