White Blood Cells (WBC)
White blood cells (leukocytes) are part of the immune system and help your body fight infections and other diseases.
Category: Complete Blood Count
Also known as: white blood cells, wbc, leucocytes, leukocytes, white cell count, bela krvna zrnca, leukociti
Reference range: 4.5–11 x10³/µL (Source: ABIM)
Standard unit: x10³/µL
High values may indicate
High WBC count (leukocytosis) may indicate infection, inflammation, allergic reactions, leukemia, or stress response.
Low values may indicate
Low WBC count (leukopenia) may indicate bone marrow disorders, autoimmune conditions, severe infections, or effects of chemotherapy.
Frequently asked questions
- What is a normal White Blood Cells (WBC) level?
- A typical reference range for White Blood Cells (WBC) is 4.5–11 x10³/µL (source: ABIM). Reference ranges vary by laboratory, age, and sex, so always compare against the range on your own lab report.
- What units is White Blood Cells (WBC) measured in?
- White Blood Cells (WBC) is most commonly reported in x10³/µL. Labs in different countries may use other units — you can convert between them with BloodId's blood test unit converter.
- Where do White Blood Cells (WBC) reference ranges come from?
- BloodId uses ABIM standard reference ranges and educational information from MedlinePlus (see our methodology). Reference ranges still vary by lab, age, and sex, so always compare against your own report.
- Can I track White Blood Cells (WBC) over time?
- Yes. Upload results from any lab and BloodId charts your White Blood Cells (WBC) over time against its reference range, so you can see whether the trend is rising, falling, or stable.
Related biomarkers
Source: MedlinePlus, U.S. National Library of Medicine
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