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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
01
SIfraction
00.01

Combined adult band. LabVals does not publish separate men's, women's, or pediatric ranges for Basophils (%); those can be narrower than the band shown.

Basophils (%) reference range, specimen, and conversion details
SpecimenWhole blood (EDTA)
Conventional range0-1 % of WBC
SI range0-0.01 fraction
Conversion factor×0.01 (conventional → SI)
PanelComplete 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.

At the bedside

Nursing considerations

  • Persistent basophilia warrants evaluation for a myeloproliferative disorder.
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