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Mean corpuscular hemoglobin blood test: what your result means
MCH measures the average amount of hemoglobin in each red blood cell. It complements MCV and MCHC when reviewing blood indices.
- Category
- Complete blood count
- Standard unit
- fmol
- Reported in
- fmol, fmol/cell, pg, pg/cell
What does high mean corpuscular hemoglobin mean?
Higher values may suggest more hemoglobin per red cell, often with larger cell size. What counts as high depends on the reference range printed on your lab report, because ranges differ between laboratories.
What does low mean corpuscular hemoglobin mean?
Lower values may suggest less hemoglobin per red cell. What counts as low depends on the reference range printed on your lab report, because ranges differ between laboratories.
Mean corpuscular hemoglobin units and conversion
Mediki shows mean corpuscular hemoglobin in fmol. Labs may report it in other units; Mediki converts them automatically so results from different labs line up on one chart.
fmol/cell is numerically the same as fmol, so no conversion is needed.
| Unit on your report | Convert to fmol | Convert back |
|---|---|---|
| pg, pg/cell | 1 pg = 0.06206 fmol | 1 fmol = 16.11 pg |
Convert a value from your report with the blood test unit converter.
Why track mean corpuscular hemoglobin over time?
A single mean corpuscular hemoglobin 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.
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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.