Enter the mean corpuscular volume and the red blood cell count into the Calculator. The calculator will evaluate the Mentzer Index. 

Mentzer Index Formula

MI = MCV / RBC

Variables:

  • MI is the Mentzer Index (())
  • MCV (fl) is the mean corpuscular volume
  • RBC (milllions per microliter) is the red blood cell count

To calculate Mentzer Index, divide the mean corpuscular volume by the red blood cell count in millions per microliter.

How to Calculate Mentzer Index?

The following steps outline how to calculate the Mentzer Index.


  1. First, determine the mean corpuscular volume. 
  2. Next, determine the red blood cell count. 
  3. Next, gather the formula from above = MI = MCV / RBC.
  4. Finally, calculate the Mentzer Index.
  5. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem : 

Use the following variables as an example problem to test your knowledge.

mean corpuscular volume = 500

red blood cell count = 43

Frequently Asked Questions

What is the significance of the Mentzer Index in medical diagnosis?

The Mentzer Index is used to differentiate between types of anemia, particularly to help distinguish between iron deficiency anemia and beta thalassemia.

How does the mean corpuscular volume (MCV) affect the Mentzer Index calculation?

The MCV measures the average size of red blood cells. A higher or lower MCV can significantly affect the Mentzer Index, as it directly impacts the ratio calculated for diagnosing different types of anemia.

Can the Mentzer Index be used independently for diagnosing anemia?

No, while the Mentzer Index is a useful tool, it should be used in conjunction with other tests and clinical findings to accurately diagnose the type of anemia.

Are there any limitations to using the Mentzer Index for anemia diagnosis?

Yes, the Mentzer Index may not provide accurate differentiation in some cases, such as when a patient has a mixed cause of anemia. Additional tests may be necessary for a comprehensive diagnosis.