Hematology

Hemoglobin (Hb)

Normal Range
Male: 13.5-17.5 g/dL; Female: 12.0-15.5 g/dL
Sample Type
Standard
Fasting
No
Unit
g/dL

Hemoglobin is the iron-containing protein in red blood cells (RBCs) responsible for transporting oxygen from the lungs to the body's tissues and carrying carbon dioxide back to the lungs. It is the primary indicator of anemia (low Hb) or polycythemia (high Hb). In the panel context (Hb, Tc, Dc & Esr), it provides the baseline for the blood's oxygen-carrying capacity and is essential for evaluating overall health, nutritional status, and chronic disease impact.

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Interactive
g/dL

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

Why Context Matters

Hb levels can be masked by hydration status; dehydration causes 'hemoconcentration' (falsely high Hb), while fluid overload causes 'hemodilution' (falsely low Hb). Chronic smokers and individuals living at high altitudes naturally have higher Hb levels, which might obscure underlying pathology.

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 Hemoglobin (Hb):

Research & Guidelines

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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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