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Normal MCV erythrocytes are called normocytic, high MCV are called macrocytic and low MCV microcytic: The MCV is considered to be the most important of the RBC indices and allows the calculation of the red blood cell distribution width. MCV in fL = (Hematocrit %)/(RBC x 10 12/L) x 10 According to the American Association for Clinical Chemistry, normal values range between 80 and 96 fL, while other sources range between 80 and 100 fL or 83 and 97 fL. This parameter offers information on the average size of the RBCs and is measured in femtoliter (which is 10 -15 L). MCH = (Hemoglobin in g/dL)/(RBC x 10 12/L) x 10 MCHC = (Hemoglobin in g/dL)/(Hematocrit %) x 100 It is measured in x10 12 cells/L or x10 6 cells /mm 3 and the normal range is between 4.2 and 6.3 x10 12/L. This is a determination carried as part of the complete blood count CBC. ■ RBC – the number of red blood cells in the sample. It is physically obtained as result of the centrifugation of the blood sample. ■ Hematocrit – expressed in percentage and representing the ratio of red blood cells to the total volume of blood. Normal values are between 12 and 18 g/dL, with a slight variation for gender. ■ Hemoglobin – measured in g/dL and representing the protein responsible for oxygen transport in the blood. The three fields contained in the RBC indices calculator are: In some cases, a slight bruise may appear locally. While most people experience a prick or stinging, for others, the discomfort may be of moderate pain. The RBC blood test involves a small venous blood sample taken through a needle connected to a tube, just like all blood tests. The main purpose in the determination of the RBC indices is the differentiation of anemias, the condition in which the number of RBCs or hemoglobin quantity within them fall below normal. They reflect characteristics of the circulating red blood cell population, thus offering information on size, shape and composition of the erythrocytes. RBC indices are reported in the results of an automated blood count or can be calculated through formulas, which will be discussed below. This health tool determines each of the three RBC indices based on patient hemoglobin, hematocrit and red blood cell count. How does this red blood cell (RBC) indices calculator work?