Test guide
Estimated Glomerular Filtration Rate (eGFR) and GFR Tests
Estimated glomerular filtration rate (eGFR) and GFR tests check how well your kidneys are working. Your kidneys are two organs on either side of your spine just below your rib cage. They have tiny filters called glomeruli. These filters remove waste and extra water from your blood and get rid of them through your urine (pee).
What it is for
An eGFR and mGFR test are used to see if your kidneys are filtering waste at a healthy rate. If they filter waste too slowly, it could be a sign that your kidneys have been damaged by kidney disease . eGFR tests are used to: Source: MedlinePlus, National Library of Medicine. Medical test information is public domain. Source identity and definition checked automatically on 2026-10-18. No individual clinical interpretation or human reviewer is asserted.
Limitations
Reference intervals and interpretation depend on the laboratory, specimen, method and clinical context. This source definition is educational information; it does not establish a diagnosis, product approval or suitability for an individual.
Also known as
- estimated GFR, eGFR, calculated glomerular filtration rate, cGFR
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