Cardiac Markers
Normal range 30-200 U/L (0.5-3.34 µkat/L SI). Specimen: Serum.
Also known as: CPK, total CK.
Combined adult band. LabVals does not publish separate men's, women's, or pediatric ranges for Creatine Kinase (CK); those can be narrower than the band shown.
| Specimen | Serum |
|---|---|
| Conventional range | 30-200 U/L |
| SI range | 0.5-3.34 µkat/L |
| Conversion factor | ×0.0167 (conventional → SI) |
| Threshold | Marked elevation (thousands) suggests rhabdomyolysis |
| Panel | Cardiac Markers |
Convert any Creatine Kinase (CK) result between units on the unit converter.
The standard teaching reference range for Creatine Kinase (CK) is 30-200 U/L in conventional units, or 0.5-3.34 µkat/L in SI units. This value is measured in serum.
For Creatine Kinase (CK), the commonly taught threshold is: Marked elevation (thousands) suggests rhabdomyolysis.
Source: Adult reference values compiled from Pagana & Pagana, Mosby's Diagnostic and Laboratory Test Reference, and Fischbach & Dunning, A Manual of Laboratory and Diagnostic Tests. Reference ranges vary by laboratory, method, age, sex, and population - always use the range printed on the actual result.
Above the range
What causes a high Creatine Kinase (CK)? Read as its own page
Below the range
What causes a low Creatine Kinase (CK)? Read as its own page
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