Free tool
CRP normal range checker
Enter your CRP (C-reactive protein) result to see whether it falls Normal, Mildly raised or High against standard adult reference ranges for a routine CRP test. Results update instantly. Nothing is stored or sent.
Your CRP result
General information only, not a diagnosis or treatment advice. Reference ranges vary by lab and method: go by the range printed on your own report, and see a doctor about any raised result.
Standard adult CRP reference ranges
| Result | Range | What it generally suggests |
|---|---|---|
| Normal | Under 10 mg/L | No significant acute inflammation detected |
| Mildly to moderately raised | 10 to 100 mg/L | Mild inflammation: a viral infection, minor injury, or a chronic inflammatory condition |
| High | Above 100 mg/L | More significant inflammation, often linked to a bacterial infection or major tissue damage |
These are commonly cited standard ranges for a routine (non hs-CRP) adult CRP test, shown for general reference. They are not the last word: your own lab sets and prints the range that applies to your report, based on its equipment and method. hs-CRP uses a separate, much lower set of bands and is not covered by this table.
Questions
What is a normal CRP level?
On most standard lab reports, a CRP result under 10 mg/L is treated as the normal (negative) range, meaning no significant acute inflammation was detected. The exact cutoff can differ a little by lab and testing method, so go by the range printed on your own report rather than a number from the internet.
What does a high CRP level mean?
CRP is a general marker of inflammation. It can rise with an infection, an injury, a flare of an autoimmune condition, or even after surgery, and a raised number does not by itself point to one cause. This tool only compares your value to a standard range and shows Normal, Mildly raised or High. It is general information, not a diagnosis: any raised result should be reviewed by your doctor alongside your symptoms and other tests.
Is hs-CRP the same as a normal CRP test?
No. hs-CRP (high-sensitivity CRP) measures the same protein but with a more sensitive assay, and labs use it mainly to help assess cardiovascular risk, not to check for active infection. It has its own, much lower reference bands, commonly cited as roughly under 1, 1 to 3, and above 3 mg/L. This tool does not calculate cardiovascular risk categories from an hs-CRP result: take that result to your doctor for interpretation.
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See the full report engine on the lab information system page →
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