As a thumb rule, the estimated level of hct (hematocrit) is thrice the value of hgb (hemoglobin).
If both the RBC as well as the hemoglobin are normal, the hematocrit can be estimated to be about three times the hemoglobin. Hematocrit and hemoglobin are both measures of red blood cells used to assist identify nutritional deficits, acute diseases, and chronic medical disorders. Hemoglobin is a protein found in red blood cells (RBCs), whereas hematocrit is the proportion of blood volume made up of red blood cells.
Regardless of the patient's hydration level, hematocrit value will always be thrice the hemoglobin value. For example, a patient with a hemoglobin value of 12.0 g/dL should have a hematocrit of 36%. When he is dehydrated, his hematocrit and hemoglobin levels fall.
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