RBC Count Calculator – Calculate Red Blood Cell Count from Hemocytometer
Calculate red blood cell concentration from hemocytometer counts. This laboratory calculator uses standard Neubauer chamber calculations to determine RBC count per microliter of blood.
Hemocytometer Data
RBC Results
Enter hemocytometer count to calculate RBC
RBC Count Reference Ranges
Adult Reference Ranges:
- Men: 4.5-5.5 million/μL
- Women: 4.0-5.0 million/μL
- Pregnant women: 3.5-5.0 million/μL
- Children: 4.0-5.2 million/μL
Related Values:
- Hemoglobin: Men 13.5-17.5, Women 12-16 g/dL
- Hematocrit: Men 41-50%, Women 36-46%
- MCV: 80-100 fL
- MCH: 27-31 pg
Frequently Asked Questions
What is a normal RBC count?
Normal RBC count is 4.5-5.5 million cells/μL for men and 4.0-5.0 million cells/μL for women. Values vary by age, altitude, and health status.
What does low RBC count mean?
Low RBC count indicates anemia, which can be caused by iron deficiency, vitamin B12/folate deficiency, blood loss, or bone marrow problems.
What does high RBC count mean?
High RBC count (polycythemia) can result from dehydration, living at high altitude, lung disease, or bone marrow disorders. It increases blood viscosity.
How is RBC count performed?
Blood is diluted (typically 1:200), loaded into a hemocytometer, and cells are counted under a microscope in designated squares. The count is then calculated using the dilution factor.
What is the formula for RBC count?
RBC/μL = (Cells counted × Dilution factor) / (Number of squares × Volume per square). For standard RBC count: (Cells × 200) / (5 × 0.004).