1. What is MCV?

Mean Corpuscular Volume (MCV) measures the average volume of red blood cells. It's an important parameter in classifying anemias as microcytic, normocytic, or macrocytic.

2. How Does the Calculator Work?

The calculator uses the MCV formula:

Where:

• Hematocrit — Percentage of blood volume occupied by red cells (%)
• RBC Count — Red blood cell count (10⁶/μL)

Explanation: The formula calculates the average volume per red blood cell in femtoliters (fL).

3. Clinical Significance

Details: MCV helps diagnose different types of anemia:

• Low MCV (<80 fL): Microcytic anemia (e.g., iron deficiency, thalassemia)
• Normal MCV (80-100 fL): Normocytic anemia
• High MCV (>100 fL): Macrocytic anemia (e.g., B12/folate deficiency)

4. Using the Calculator

Tips: Enter hematocrit as percentage and RBC count in millions per microliter. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What's the normal range for MCV?
A: Typically 80-100 fL in adults, though ranges vary slightly by laboratory.

Q2: Can MCV be normal in anemia?
A: Yes, normocytic anemia occurs with normal MCV but low hemoglobin.

Q3: What affects MCV results?
A: Factors include hydration status, recent transfusion, and certain medications.

Q4: How does MCV change with age?
A: Newborns have higher MCV (100-120 fL) which decreases to adult range by adolescence.

Q5: Is MCV alone diagnostic?
A: No, it should be interpreted with other indices (MCH, MCHC) and clinical context.