Educational information only. At Precursor, blood testing is requested and reviewed by a clinician and considered alongside your history and other markers, not as a stand-alone diagnosis. Testing is performed in NATA-accredited laboratories to ISO 15189 standards.

What is eGFR?

eGFR stands for estimated glomerular filtration rate. It is a calculation, based mainly on your creatinine along with age and sex, that estimates how many millilitres of blood your kidneys filter each minute. In effect, it translates a raw creatinine into a more intuitive measure of kidney performance.

Why it matters

eGFR is the number clinicians most often use to summarise kidney function and to track it over time. Because it accounts for age and sex, it gives a more standardised read than creatinine alone, and it is central to detecting and monitoring reduced kidney function.

What your results can mean

Lower than optimal

A lower eGFR suggests the kidneys are filtering less efficiently. A single low value can be influenced by hydration and other factors, so it is confirmed over time rather than read from one result.

Within the healthy range

A higher eGFR generally reflects well-functioning kidneys. Note that eGFR is often capped at a top value on lab reports rather than reported as an exact high number.

Reference ranges in Australia

eGFR is reported in millilitres per minute per 1.73 square metres (mL/min/1.73m²). As a general guide, a value of 90 or above is often considered normal, with sustained lower values warranting clinical review. Read your result against your own report and in context.

Test your kidney health with Precursor

eGFR is best tracked over time alongside creatinine. At Precursor it is measured as part of Full Advanced Bloods, a single clinician-reviewed blood draw covering your kidney, heart, metabolic, hormonal, liver, thyroid and nutrient markers together, giving you and your clinician a broad baseline to understand and track.