Can this result diagnose a condition on its own?

No. A laboratory result should be interpreted with related tests, symptoms, medical history, and the reference information on the report.

Which reference range should I use?

Use the reference interval provided by the laboratory that performed the test. Clinical decision cutoffs, when relevant, are shown separately.

When should I discuss the result with a healthcare professional?

Professional assessment is appropriate when a result is markedly outside the reference interval, serious symptoms are present, an abnormality persists or recurs, or follow-up has been recommended.

Information about a laboratory test

White Blood Cell Count (WBC): What Does This Blood Test Measure?

Measures the total number of white blood cells in the blood.

Test summary

Test name: White Blood Cell Count (WBC)
Abbreviations: WBC, Lökosit
Category: Hematology / Immunology
Panel: Complete Blood Count (CBC) / Hemogram
Specimen: Whole blood
Common units: /µL, x10^9/L

What does the test measure?

Measures the total number of white blood cells in the blood.

Why is the test ordered?

Used as part of the complete blood count when evaluating infection, inflammation, immune-system conditions, and disorders that affect the bone marrow.

Information about a low result

A low WBC count, or leukopenia, can occur with some infections, medicines, chemotherapy, or conditions that affect the bone marrow.

Information about a high result

A high WBC count, or leukocytosis, can occur with infection, inflammation, stress, certain medicines, and some hematologic conditions.

Reference and clinical context

Use the reference interval printed on your own laboratory report first. Reference intervals may vary by laboratory, method, unit, age, sex, pregnancy, specimen, and other conditions. Numeric records in this workbook are explicitly labeled as either source-based example reference intervals or clinical decision cutoffs.

Reference range 1

>= 4500 – <= 11000 cells/µL

Population: General
Specimen: Whole blood

Example reference interval

MedlinePlus example. Age-specific and lab-specific ranges may differ.

Reference ranges may vary by laboratory, method used, age, sex, pregnancy status, and clinical context. The reference range on your own laboratory report takes precedence.

Interpretation notes

The total WBC count often becomes more meaningful when interpreted with the neutrophil, lymphocyte, monocyte, eosinophil, and basophil differential.

Related specialties

Internal Medicine
Hematology
Infectious Diseases
Pediatrics

Frequently asked questions

More information about this test

Sources

CBC blood test — U.S. National Library of Medicine (MedlinePlus)
Government medical reference · 2024 · CBC components; example adult reference ranges; high/low RBC, WBC and platelet context · Verified: Aug 11, 2026
White Blood Count (WBC) — U.S. National Library of Medicine (MedlinePlus)
Government medical reference · 2024 · Total WBC count and relationship to differential · Verified: Aug 11, 2026
Blood Differential — U.S. National Library of Medicine (MedlinePlus)
Government medical reference · 2024 · Neutrophil, lymphocyte, monocyte, eosinophil, basophil roles and example percentages · Verified: Aug 11, 2026