MHC is the mean cell hemoglobin. This represents the absolute amount of hemoglobin in the average red cell in a sample. Its units are picograms (pg) per cell. The MCH is calculated from the [Hb] and the RBC using the following equation:
This value is not that useful, in that the combination of MCV and MCHC give more specific information. For example, a low MCH could be due to smaller than normal cells with normal Hb concentration, or normal sized cells with lower than normal Hb concentration. It is better to know the values for cell volume and Hb concentration directly.
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