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CRP blood test: what your result means

CRP measures a protein made by the liver that rises during inflammation. It is commonly used to track inflammatory activity.

Category
Inflammation
Standard unit
nmol/L
Reported in
nmol/L, mg/L, µg/mL, mg/dL, mg/100mL, mg% and more

What does high CRP mean?

Higher values may suggest active inflammation, infection, or tissue stress. What counts as high depends on the reference range printed on your lab report, because ranges differ between laboratories.

What does low CRP mean?

Lower values usually suggest low current systemic inflammation. What counts as low depends on the reference range printed on your lab report, because ranges differ between laboratories.

CRP units and conversion

Mediki shows CRP in nmol/L. Labs may report it in other units; Mediki converts them automatically so results from different labs line up on one chart.

CRP unit conversion factors
Unit on your reportConvert to nmol/LConvert back
mg/L, µg/mL1 mg/L = 9.524 nmol/L1 nmol/L = 0.105 mg/L
mg/dL, mg/100mL, mg%1 mg/dL = 95.24 nmol/L1 nmol/L = 0.0105 mg/dL
g/L1 g/L = 9,524 nmol/L1 nmol/L = 0.000105 g/L

Convert a value from your report with the blood test unit converter.

Why track CRP over time?

A single CRP result is a snapshot. Comparing it with your earlier tests shows whether a value is stable, slowly drifting, or responding to a change in treatment or lifestyle, which is often more useful than one number on its own.

Read our guide on how to read blood test results to understand reference ranges, flags and units.

Following CRP as part of a panel? See the ferritin and iron tracker.

Track your CRP results in one chart

Upload your lab reports and Mediki plots every CRP result against its reference range. Your first 15 pages are free.

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Sources

Medical disclaimer: This page is general information, not medical advice. Reference ranges differ between laboratories, and only a doctor can interpret your results in the context of your health.