Mean corpuscular hemoglobin (MCH) defined as the average weight of Hb per RBC. MCH is not directly measured; it is derived:
MCH = Hb/RBC count
Under normal conditions:
30 g/L = 150 g/L/5 x 1012/
Imagine drilling a hole in the wall of an RBC, extracting all the hemoglobin (red color in schematic below) and weighing it… that would give you the MCH