Normal eGFR Range by Age: What Is a Good Kidney Function Number?

The normal eGFR range changes with age, but there is no single “good” number that applies to every person. eGFR tends to decline gradually with age, and a result should be interpreted using the laboratory reference, urine albumin, health history, and the trend over time.

Use our eGFR by age calculator to compare a result with typical age-related values, then use the CKD stage calculator to see the formal G1-G5 range.

Typical eGFR values by age

Published population estimates vary, but a commonly cited approximate pattern is:

These are averages, not diagnostic thresholds. A healthy individual can fall above or below an average because of body size, muscle mass, genetics, and measurement variation.

Is a lower eGFR normal in older adults?

Sometimes. An eGFR of 60-89 can be age-related, particularly when urine albumin and urinalysis are normal. However, persistent eGFR below 60, a rapid decline, or evidence of kidney damage deserves clinical follow-up at any age.

Why age charts should not replace testing

eGFR is calculated from serum creatinine and other variables. Dehydration, high meat intake, intense exercise, supplements, medicines, and acute illness can change creatinine. Urine albumin-to-creatinine ratio (UACR) often adds important information that an age chart cannot provide.

Track laboratory values using the same units and note the date. A trend in your own results is usually more useful than comparing yourself with a population average.

This article is educational information, not medical advice. Discuss an unexpected, persistent, or falling eGFR with a qualified healthcare professional.