eGFR calculator — estimate your kidney function and CKD stage
Enter your serum creatinine, age and sex to estimate your eGFR using the CKD-EPI 2021 (race-free) equation, and see which chronic kidney disease (CKD) stage it falls into — explained in plain English.
— mL/min/1.73m²
Medical disclaimer: This calculator is for general educational purposes only and does not constitute medical advice or a diagnosis. Results are estimates based on the values you enter and standard formulas and reference ranges, which vary between laboratories and between individuals. Always discuss your results with a qualified healthcare professional. If you are experiencing a medical emergency, call 9-1-1.
Get a nephrologist opinion on your kidney function — $45
Upload your creatinine, eGFR and urine ACR results and get a written opinion from a PGIMER/AIIMS-trained nephrologist within 6 hours — what your numbers mean, what to repeat, and exactly what to ask your GP. No referral needed.
Frequently asked questions
How is eGFR calculated?
This tool uses the CKD-EPI 2021 (race-free) equation, the current standard, which estimates the glomerular filtration rate from your serum creatinine, age and sex. It is an estimate and should be confirmed with a repeat test and a urine albumin-to-creatinine ratio (ACR).
What eGFR is considered normal?
An eGFR of 90 or above is generally normal, and 60–89 is a mild reduction that is common with age. Below 60 for more than three months indicates chronic kidney disease. The stages are G1 (≥90), G2 (60–89), G3a (45–59), G3b (30–44), G4 (15–29) and G5 (<15).
Does one low eGFR mean I have kidney disease?
Not necessarily. A single result can be affected by dehydration, recent heavy protein or creatine intake, some medications, or acute illness. Kidney disease is diagnosed on a persistent reduction over three months, ideally with a urine ACR. Ask your doctor to repeat it and check the trend.
Can Ginie Health review my kidney results?
Yes. A written opinion from a PGIMER/AIIMS-trained nephrologist costs $45 CAD and is delivered within 6 hours — no referral needed. It explains what your eGFR and ACR mean, what to repeat, and what to push for while you wait for a Canadian nephrology appointment.