High Quality Content by WIKIPEDIA articles! The hematocrit (Ht or HCT) or packed cell volume (PCV) or erythrocyte volume fraction (EVF) is the percentage (%) of the concentration of red blood cells in blood. It is normally about 45% for men and 40% for women. It is considered an integral part of a person`s complete blood count results, along with hemoglobin concentration, white blood cell count, and platelet count.