Complete Blood Count (CBC)

Neutrophils (%)

Q: What causes a high Neutrophils (%)?

Common causes of a high Neutrophils (%): Acute bacterial infection; Inflammation, stress, or steroids; Tissue necrosis.

Q: What causes a low Neutrophils (%)?

Common causes of a low Neutrophils (%): Overwhelming sepsis; Chemotherapy or marrow suppression; Viral infection.

Normal range 40-70 % of WBC (0.4-0.7 fraction SI). Specimen: Whole blood (EDTA).

Also known as: segs, polys, PMNs.

40-70 % of WBCReference range

Reference range

Conventional% of WBC

4070

SIfraction

0.40.7

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

Neutrophils (%) reference range, specimen, and conversion details
Specimen	Whole blood (EDTA)
Conventional range	40-70 % of WBC
SI range	0.4-0.7 fraction
Conversion factor	×0.01 (conventional → SI)
Panel	Complete Blood Count (CBC)

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

What is the normal range for Neutrophils (%)?

The standard teaching reference range for Neutrophils (%) is 40-70 % of WBC in conventional units, or 0.4-0.7 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

What causes a high Neutrophils (%)?

Acute bacterial infection
Inflammation, stress, or steroids
Tissue necrosis

What causes a high Neutrophils (%)? Read as its own page

Below the range

What causes a low Neutrophils (%)?

Overwhelming sepsis
Chemotherapy or marrow suppression
Viral infection

What causes a low Neutrophils (%)? Read as its own page

At the bedside

Nursing considerations

Neutrophilia with bands (left shift) suggests acute bacterial infection.

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