Hematology

Hematocrit (Hct)

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

Hematocrit measures the volume percentage of red blood cells in whole blood. It is a fundamental component of the CBC used to evaluate anemia, polycythemia, and hydration status. It represents the oxygen-carrying capacity of the blood relative to its total volume.

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

Why Context Matters

Hematocrit is highly sensitive to plasma volume changes. A patient may appear to have high Hct due to simple dehydration (hemoconcentration) or low Hct due to fluid overload (hemodilution), masking the true red cell mass.

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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