All tests · Complete Blood Count (CBC)
Complete Blood Count (CBC)
Normal range 4.5–11 10³/µL (4.5–11 10⁹/L SI). Specimen: Whole blood (EDTA).
Also known as: leukocyte count, total leukocytes.
| Specimen | Whole blood (EDTA) |
|---|---|
| Conventional range | 4.5–11 10³/µL |
| SI range | 4.5–11 10⁹/L |
| Conversion factor | ×1 (conventional → SI) |
| Critical value | < 2.0 or > 30.0 × 10⁹/L (severe neutropenia or marked leukocytosis) |
| Panel | Complete Blood Count (CBC) |
Convert any White Blood Cell Count (WBC) result between units on the unit converter.
The standard teaching reference range for White Blood Cell Count (WBC) is 4.5–11 10³/µL in conventional units, or 4.5–11 10⁹/L in SI units. This value is measured in whole blood (edta).
A commonly taught critical (panic) value is < 2.0 or > 30.0 × 10⁹/L (severe neutropenia or marked leukocytosis). Critical results are reported to the provider immediately under your facility's policy.
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.
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