Kidney Function Test
The kidneys clear waste from the blood. Creatinine is the waste product used to judge how well they are doing it, and eGFR turns that creatinine into an estimate of filtration — which is the number kidney disease is actually staged by.
This is an educational reading aid, not a diagnosis and not medical advice. Reference ranges differ between laboratories — always read the range printed on your own report. Nothing here can see you, your history or your medicines. Do not start, stop or change any treatment on the strength of this page: take your report to a qualified doctor.
Reference ranges reviewed by Dr. Mohan Gayenlast reviewed
Your values
Fill in only the ones on your report. Anything you leave blank is simply skipped.
A muscle waste product cleared almost entirely by the kidneys.
The estimated filtration rate — the number chronic kidney disease is staged by.
A waste product from protein breakdown.
The waste product that forms crystals in gout.
Enter one or more values and your reading will appear here.
What this panel is easy to get wrong
- CREATININE COMES FROM MUSCLE. A muscular person can sit above the range with perfect kidneys, and a frail or elderly person can have substantial kidney impairment with a creatinine that still looks normal. eGFR corrects for some of this; it does not remove it.
- A single raised creatinine does not diagnose chronic kidney disease. CHRONIC means present for more than three months — one abnormal result needs a repeat.
- Dehydration, a recent very high-protein meal, heavy exercise and several common medicines all raise creatinine temporarily.
- eGFR equations are not validated in pregnancy, in acute illness with rapidly changing kidney function, or at the extremes of body size.
Where these ranges come from: Commonly published adult intervals; eGFR categories follow the KDIGO chronic kidney disease staging (G1–G5).
Where this is written from: This site is written from Indian clinical practice. Drug availability and brand names, vaccination schedules, national health programmes and some reference cut-offs differ between countries — a schedule or a threshold that is standard here may not be standard where you are. If you are reading outside India, check anything on this page against your own country’s guidance before you act on it.
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Urea, creatinine, eGFR and uric acid.