All tests · Complete Blood Count (CBC)
Complete Blood Count (CBC)
Normal range 11.5-14.5 %. Specimen: Whole blood (EDTA).
Also known as: red cell variation.
Combined adult band. LabVals does not publish separate men's, women's, or pediatric ranges for Red Cell Distribution Width (RDW); those can be narrower than the band shown.
| Specimen | Whole blood (EDTA) |
|---|---|
| Conventional range | 11.5-14.5 % |
| SI range | 11.5-14.5 % |
| Conversion factor | ×1 (conventional → SI) |
| Panel | Complete Blood Count (CBC) |
Convert any Red Cell Distribution Width (RDW) result between units on the unit converter.
The standard teaching reference range for Red Cell Distribution Width (RDW) is 11.5-14.5 %. This value is measured in whole blood (edta).
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 Red Cell Distribution Width (RDW)? Read as its own page
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