Complete Blood Count (CBC)

Basophils (%)

Normal range 0–1 % of WBC (0–0.01 fraction SI). Specimen: Whole blood (EDTA).

Also known as: basos.

0–1 % of WBCReference range

Reference range

Conventional% of WBC

SIfraction

00.01

Specimen	Whole blood (EDTA)
Conventional range	0–1 % of WBC
SI range	0–0.01 fraction
Conversion factor	×0.01 (conventional → SI)
Panel	Complete Blood Count (CBC)

Convert any Basophils (%) result between units on the unit converter.

What is the normal range for Basophils (%)?

The standard teaching reference range for Basophils (%) is 0–1 % of WBC in conventional units, or 0–0.01 fraction in SI units. 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

Common causes of a high Basophils (%)

Myeloproliferative disorders
Chronic myeloid leukemia
Hypersensitivity reactions

Below the range

Common causes of a low Basophils (%)

Acute infection
Stress or steroids

At the bedside

Nursing considerations

Persistent basophilia warrants evaluation for a myeloproliferative disorder.

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Absolute Neutrophil Count (ANC)2500–7000 cells/µL Eosinophils (%)1–4 % of WBC Hematocrit (Hct)36–52 %Hemoglobin (Hgb)12–17.5 g/dL Lymphocytes (%)20–40 % of WBC Mean Corpuscular Hemoglobin (MCH)27–33 pg/cell