Hematology

Hematocrit (Hct)

Normal Range
Male: 40% - 54%; Female: 36% - 48%
Sample Type
Standard
Fasting
No
Unit
%

Hematocrit represents the percentage of whole blood volume that is made up of red blood cells (RBCs). Part of a Complete Blood Count (CBC), it is a vital measure of the blood's oxygen-carrying capacity. It is used to diagnose anemia, monitor response to treatment for blood disorders, and assess hydration status.

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Interactive
%

Enter your lab result to see where you stand compared to the standard reference range.

Why Context Matters

Hct values are highly sensitive to plasma volume; for example, severe dehydration will cause a 'false' high Hct because the blood is more concentrated, even if the total number of RBCs hasn't changed.

Lab ranges are statistical averages, not biological laws. "Normal" for a 20-year-old male isn't normal for a 60-year-old female.

Clinical References

Source-of-truth databases and clinical guidelines for Hematocrit (Hct):

Research & Guidelines

Related Indicators

Activated Partial Thromboplastin Time (APTT)

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Blood Cell Morphology

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AML Comboquest 9

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DR

Medically Reviewed by Dr. Binoy Babu, MBBS

Board Certified Doctor • 10+ Years Clinical Experience

Dr. Babu is a practicing physician dedicated to empowering patients with clear, actionable medical information. He founded 2opi to bridge the gap between complex lab reports and patient understanding, ensuring everyone has access to a reliable second opinion.

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