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C-Reactive Protein (CRP) Unit Converter
C-Reactive Protein (CRP) is an acute-phase protein synthesized by the liver in response to inflammatory cytokines like IL-6. It is one of the most sensitive markers of systemic inflammation. In response to an acute stimulus (infection, trauma, surgery), CRP levels can rise 1,000-fold within 24–48 hours.[Image of acute phase protein response]
Standard CRP assays are used to monitor infections and autoimmune flares (like Rheumatoid Arthritis). High-sensitivity CRP (hs-CRP) assays detect much lower levels (0.5–10 mg/L) and are used to assess cardiovascular risk, reflecting low-grade vascular inflammation. Because reporting units vary by region (mg/L vs mg/dL), confusion can lead to 10-fold interpretation errors. This converter ensures accurate switching between these standards.
SI Units
RecommendedMilligrams per liter (Standard International).
Conventional Units
Clinical Context
Standard CRP: Used for acute inflammation. Typical reference range is < 10 mg/L (1.0 mg/dL). Bacterial infections often exceed 100 mg/L.
hs-CRP (Cardio CRP): Used for CVD risk stratification.
• Low Risk: < 1.0 mg/L
• Average Risk: 1.0 – 3.0 mg/L
• High Risk: > 3.0 mg/L
Values > 10 mg/L on an hs-CRP assay usually indicate acute inflammation rather than cardiovascular risk. The molar conversion uses MW ~118 kDa: 1 mg/L ≈ 8.47 nmol/L.
Clinical References
How to Use This Calculator
Follow these steps to get accurate clinical conversions instantly.
Enter Values
Input your laboratory results into the corresponding unit field (e.g., mg/L). You can use either dot or comma decimals.
Automatic Conversion
The calculator works in real-time. As you type in one field, all other units (like mg/dL) are instantly updated.
Verify Units
Check the SI Units section. mg/L is the standard for hs-CRP reporting.
Reset
Use the Clear button to reset all fields before starting a new calculation.
Frequently Asked Questions & Tips
Yes. 1 mg/L is exactly equal to 1 µg/mL.
They measure the same protein. The difference is the sensitivity. hs-CRP can detect very low levels (0.5-10 mg/L) used for cardiac risk.