WBC Count Calculator – Calculate White Blood Cell Count from Hemocytometer
Calculate white blood cell concentration from hemocytometer counts. This laboratory calculator determines WBC count per microliter for immune system assessment and infection monitoring.
Hemocytometer Data
WBC Results
Enter hemocytometer count to calculate WBC
WBC Reference Ranges
Adult Reference Range:
- Total WBC: 4,000-11,000 cells/μL
- Neutrophils: 2,500-7,000 cells/μL (50-70%)
- Lymphocytes: 1,000-3,500 cells/μL (20-40%)
- Monocytes: 200-800 cells/μL (2-8%)
Clinical Significance:
- High WBC: Infection, inflammation, stress
- Low WBC: Viral infection, bone marrow issues
- High neutrophils: Bacterial infection
- High lymphocytes: Viral infection
Frequently Asked Questions
What is a normal WBC count?
Normal WBC count is 4,000-11,000 cells per microliter of blood. Values vary slightly by lab and individual factors like age and pregnancy.
What does high WBC count mean?
High WBC (leukocytosis) usually indicates infection, inflammation, or stress. It can also occur with certain medications, smoking, or blood disorders.
What does low WBC count mean?
Low WBC (leukopenia) can result from viral infections, autoimmune disorders, bone marrow problems, chemotherapy, or certain medications.
How is WBC count performed?
Blood is diluted with Turk's solution (which lyses RBCs), loaded into a hemocytometer, and WBCs are counted in the 4 corner squares under a microscope.
What is the WBC count formula?
WBC/μL = (Cells counted × Dilution factor) / (Number of squares × Volume per square). For standard count: (Cells × 20) / (4 × 0.1).