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Mean corpuscular volume blood test: what your result means
MCV measures the average size of red blood cells. It helps classify anemia patterns.
- Category
- Complete blood count
- Standard unit
- fL
- Reported in
- fL, µm^3
What does high mean corpuscular volume mean?
Higher values may suggest larger red cells, often linked to vitamin-related patterns. What counts as high depends on the reference range printed on your lab report, because ranges differ between laboratories.
What does low mean corpuscular volume mean?
Lower values may suggest smaller red cells, often linked to iron-related patterns. What counts as low depends on the reference range printed on your lab report, because ranges differ between laboratories.
Mean corpuscular volume units and conversion
Mediki shows mean corpuscular volume in fL. Labs may report it in other units; Mediki converts them automatically so results from different labs line up on one chart.
µm^3 is numerically the same as fL, so no conversion is needed.
Why track mean corpuscular volume over time?
A single mean corpuscular volume result is a snapshot. Comparing it with your earlier tests shows whether a value is stable, slowly drifting, or responding to a change in treatment or lifestyle, which is often more useful than one number on its own.
Read our guide on how to read blood test results to understand reference ranges, flags and units.
Track your mean corpuscular volume results in one chart
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Medical disclaimer: This page is general information, not medical advice. Reference ranges differ between laboratories, and only a doctor can interpret your results in the context of your health.