NormRangeWhat the normal range is at your age — with the source printed on the page.

Creatinine of 2.18 mg/dL for women

2.18 mg/dL
Well above the reference range
Creatinine of 2.18 mg/dL for women is well above the usual reference range by commonly reported adult reference ranges
Where it fallscommonly reported adult reference rangesWell above the reference range
Creatininefor women2.18mg/dL
Usual reference range0.59 – 1.04mg/dL
Same result in µmol/Lthe unit used outside the United States193µmol/L
Below the reference rangeunder 0.59mg/dL
Within the reference range0.59 – 1.03mg/dL
Above the reference range1.04 – 1.99mg/dL
Well above the reference rangethis reading2 and abovemg/dL

Notes

  • A creatinine of 2.18 mg/dL is outside the range a web page should be the end of. Repeat the measurement, and contact a doctor rather than reading further. If it comes with chest pain, breathlessness, confusion, weakness or a change in vision, treat it as an emergency.
  • Reference ranges differ between laboratories. The bands above follow commonly reported adult reference ranges. Your own report prints the range its analyser was calibrated against, and that printed range is the one to compare against — a difference of a few units between labs is normal and does not mean either is wrong.
  • Creatinine on its own says less than the eGFR calculated from it. The same value means different things at different ages, sexes and body sizes, which is why laboratories report the estimate alongside it. Read the eGFR first.
  • Several ordinary things raise it without the kidneys changing. A large cooked-meat meal the evening before, creatine supplements, intense exercise in the previous day, and dehydration all push it up. So do some drugs — trimethoprim and cimetidine among them — which block creatinine's secretion into urine without affecting filtration at all.

What creatinine of 2.18 mg/dL means

A reading of 2.18 mg/dLfor women falls in Well above the reference range by commonly reported adult reference ranges.

The usual reference range is 0.59 – 1.04 mg/dL.

Reading it next to the rest of the picture

A single figure is a snapshot. What a clinician does with it is set by what sits around it — the other results on the same report, what the person is being treated for, what they were doing in the hours before the sample, and what the previous result was. Two people can hand over the same number and leave with different advice, and neither has been given the wrong answer.

That is also why the bands on this page are drawn from a named guideline rather than from a rounded rule of thumb. A threshold is a decision point somebody argued for in print, not a law of nature, and knowing which document a line comes from is what lets you tell a meaningful result from a borderline one.

Nearby sizes

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