Blood count

CBC Markers Explained: WBC, RBC, Hemoglobin, and Hematocrit

Understand key CBC markers including WBC, RBC, hemoglobin, and hematocrit in one quick guide.

Educational guide only — not medical advice. Always review results with a qualified clinician.

5 min read
Last updated
Complete blood count WBC RBC HGB HCT — Norya

What do WBC, RBC, HGB and HCT mean?

WBC (white blood cells) can change with infection or inflammation. RBC (red blood cells), HGB (haemoglobin) carries oxygen, and HCT (haematocrit) is the proportion of red cells in blood. Reference ranges vary by lab. Interpret your result using the ranges on your report and with your doctor. If one marker is abnormal, you may also want to compare with our focused guides to hemoglobin and platelets.

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How this guide should be used

This article is educational and should be reviewed alongside our medical review, methodology, and transparency pages. Use it to prepare for a clinician conversation, not as a diagnosis.

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