Complete Blood Count (CBC): Basic Facts

A complete blood count test measures red blood cells, white blood cells, hemoglobin (the oxygen-carrying protein in red blood cells), hematocrit (the proportion of red blood cells to plasma in the blood), and platelets.

Based upon the result, your doctor will have a review of your overall health.

Reference Value

Red blood cell

  • Male: 4.35-5.65 trillion cells/L (4.32-5.72 million cells/mcL)
  • Female: 3.92-5.13 trillion cells/L (3.90-5.03 million cells/mcL)


  • Male: 2-16.6 grams/dL (132-166 grams/L)
  • Female: 6-15 grams/dL (116-150 grams/L)


  • Male: 38.3-48.6 percent
  • Female: 35.5-44.9 percent

White blood cell

  • 3.4-9.6 billion cells/L (3,400 to 9,600 cells/mcL)


  • Male: 135-317 billion/L (135,000 to 317,000/mcL)
  • Female: 157-371 billion/L (157,000-371,000/mcL)

Keywords: complete blood count; CBC.

* The Content is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition.