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eGFR Explained
✓ Fact-checked against sourced references · Editorial standards
eGFR is the estimated glomerular filtration rate — a calculated estimate of kidney filtering used to detect and stage kidney disease.
How it is calculated
It is derived from serum creatinine together with age and sex. It is an estimate, not a direct measurement.
Why it matters
eGFR stages CKD from 1 to 5 and guides decisions such as when to prepare for dialysis.
Frequently asked questions
What is a normal eGFR?
Usually 90 or above, with a small natural decline with age.
Sources
Related articles
Educational only. This guide is general kidney-care information, not individual medical advice.