Hematocrit

  • Medical Author:
    William C. Shiel Jr., MD, FACP, FACR

    Dr. Shiel received a Bachelor of Science degree with honors from the University of Notre Dame. There he was involved in research in radiation biology and received the Huisking Scholarship. After graduating from St. Louis University School of Medicine, he completed his Internal Medicine residency and Rheumatology fellowship at the University of California, Irvine. He is board-certified in Internal Medicine and Rheumatology.

  • Medical Editor: Melissa Conrad Stöppler, MD
    Melissa Conrad Stöppler, MD

    Melissa Conrad Stöppler, MD

    Melissa Conrad Stöppler, MD, is a U.S. board-certified Anatomic Pathologist with subspecialty training in the fields of Experimental and Molecular Pathology. Dr. Stöppler's educational background includes a BA with Highest Distinction from the University of Virginia and an MD from the University of North Carolina. She completed residency training in Anatomic Pathology at Georgetown University followed by subspecialty fellowship training in molecular diagnostics and experimental pathology.

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What is a normal hematocrit?

The normal ranges for hematocrit are depend on the age and, after adolescence, the sex of the individual. The normal ranges are:

  • Newborns: 55% to 68%
  • One (1) week of age: 47% to 65%
  • One (1) month of age: 37% to 49%
  • Three (3) months of age: 30% to 36%
  • One (1) year of age: 29% to 41%
  • Ten (10) years of age: 36% to 40%
  • Adult males: 42% to 54%
  • Adult women: 38% to 46%

These values may vary slightly among different laboratories. Continue Reading

Reviewed on 10/29/2015
References
Medically reviewed by Avrom Simon, MD; Board Certified Preventative Medicine with Subspecialty in Occupational Medicine

REFERENCE:

Braunwald, Eugene, et al. Harrisons's Principles of Internal Medicine. 17th ed. McGraw-Hill, 2008.

IMAGES:

1. Getty Images

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