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Mean Corpuscular Volume (MCV)

Published: July 27, 2026Updated: August 25, 2026

The Mean Corpuscular Volume (MCV) measures the average size of red blood cells in a blood sample.

Quick summary

MCV measures the average size of red blood cells.

Medically reviewed by WellAlly Editorial TeamLast reviewed August 25, 2026Editorial policy

Key facts at a glance

Units
fL
Clinical utility
diagnostic
Result kind
quantitative
FDA-cleared
Sysmex MCV, Abbott MCV, Siemens MCV
interpretation: {"text":"May indicate microcytic anemia, iron deficiency, or thalassemia.","label":"Low MCV (< 80 fL)"}; {"text":"May suggest macrocytic anemia, vitamin B12 or folate deficiency, or liver disease.","label":"High MCV (> 100 fL)"}

Mean Corpuscular Volume (MCV) is a measure used in hematology to assess the average size of red blood cells, also known as erythrocytes. It is calculated by dividing the hematocrit by the red blood cell count.

This biomarker is crucial in diagnosing and classifying different types of anemia. For instance, a high MCV may indicate macrocytic anemia, while a low MCV may suggest microcytic anemia.

MCV is typically evaluated alongside other red blood cell indices, such as MCH and MCHC, to provide a comprehensive understanding of red blood cell characteristics.

Frequently asked questions

What is a normal MCV range?
The normal MCV range is typically between 80 and 100 fL.
Can MCV levels change over time?
Yes, MCV levels can fluctuate due to factors such as diet, medication, and underlying health conditions.
  1. 1
    Mean Corpuscular Volume (MCV)Source
  2. 2
    Red Blood Cell IndicesSource

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This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 25, 2026. · Read our editorial policy