A white blood count measures the number of white blood cells (WBCs) in your blood. White blood cells, also called leukocytes, are part of your immune system. They are a type of blood cell made in your bone marrow and found in your blood and lymph tissue (part of your immune system). If you are injured or get sick, the white blood cells will travel through your bloodstream and tissues to where they are needed.
A white blood count is most often used to help diagnose or monitor disorders related to having a high white blood cell count or low white blood cell count.
Source: MedlinePlus, U.S. National Library of Medicine
Normal range
- Normal
- 0–0.33 ×10⁹/L
- Female · ≤ 14 d
- 0.09–0.64 ×10⁹/L
- Female · 1 mo – 2 mo
- 0.04–0.63 ×10⁹/L
- Female · 12 y – 17 y
- 0.1–0.2 ×10⁹/L
- Female · 15 d – 28 d
- 0.06–0.75 ×10⁹/L
- Female · 2 mo – 5 mo
- 0.02–0.74 ×10⁹/L
- Female · 2 y – 3 y
- 0.03–0.46 ×10⁹/L
- Female · 3 y – 11 y
- 0–0.5 ×10⁹/L
- Female · 6 mo – 2 y
- 0.02–0.58 ×10⁹/L
- Female
- 0.03–0.48 ×10⁹/L
- Male · ≤ 14 d
- 0.12–0.66 ×10⁹/L
- Male · 1 mo – 2 mo
- 0.05–0.57 ×10⁹/L
- Male · 12 y – 17 y
- 0.1–0.2 ×10⁹/L
- Male · 15 d – 28 d
- 0.08–0.8 ×10⁹/L
- Male · 2 mo – 5 mo
- 0.03–0.61 ×10⁹/L
- Male · 2 y – 3 y
- 0.03–0.53 ×10⁹/L
- Male · 3 y – 11 y
- 0–0.5 ×10⁹/L
- Male · 6 mo – 2 y
- 0.02–0.82 ×10⁹/L
- Male
- 0.03–0.48 ×10⁹/L
Ranges from American Board of Internal Medicine (Laboratory Test Reference Ranges), Mayo Clinic Laboratories (Test Catalog).
All 19 source ranges
What an abnormal result can be associated with
- A high result
- Increased total eosinophil count
Associations from LOINC2HPO (Human Phenotype Ontology). This is reference information, not a diagnosis — only a clinician can interpret your result in context.
Details
- Sample
- Whole blood · LOINC
- Code
- LOINC 711-2 · ×10⁹/L
- Also known as
- Eosin, Elec, Count, Cnt, Eos