Compare markers
Hemoglobin vs hematocrit
Both are red blood cell measures on a CBC and usually move in similar directions.
General biomarker education — not personalized medical advice. Learn more
Hemoglobin
Hemoglobin is the protein in red blood cells that carries oxygen, measured on a CBC.
Hematocrit
Hematocrit is the percentage of blood volume made up of red blood cells, part of a CBC.
Why both appear on reports
CBC panels report hemoglobin and hematocrit together because they describe overlapping aspects of red cells.
When to discuss with your clinician
Ask whether symptoms such as fatigue prompted the CBC and if repeat testing is recommended.