What is CBC(Complete Blood Count) Test

Know about normal range of parameters of CBC test. Learn what is CBC test and why CBC test is required?

A complete blood count (CBC) is a pathological test measures the following blood parameters to diagnose various health problems.

In complete blood count (CBC) test following as been measured

  • The total amount of haemoglobin in the blood
  • The fraction of the blood composed of red blood cells (haematocrit)
  • The number of red blood cells (RBC count)
  • The number of white blood cells (WBC count)

Some time platelet count is also included in the CBC measurement.

The CBC test also provides information about the following

  • Average red blood cell size (MCV)
  • The amount of haemoglobin relative to the size of the cell (haemoglobin concentration) per red blood cell (MCHC)
  • Haemoglobin amount per red blood cell (MCH)

CBC is used to detect or monitor many health conditions. It can be used to diagnose following

  • Diagnose infections or allergies
  • Detect blood clotting problems or blood disorders, including anemia
  • Evaluate red blood cell production or destruction

What is normal Ranges of CBC test?

Blood counts may vary with region and altitude. In general, normal results range for hemoglobin, RBC count, RBC indices, WBC Count, Hematocrit as given below


  • Male: 13.8 to 17.2 gm/dL
  • Female: 12.1 to 15.1 gm/dL

RBC count

  • Male: 4.7 to 6.1 million cells/mcL
  • Female: 4.2 to 5.4 million cells/mcL

Red blood cell indices

  • MCV: 80 to 95 femtoliter
  • MCH: 27 to 31 pg/cell
  • MCHC: 32 to 36 gm/dL

WBC count

  • 4,500 to 10,000 cells/mcL


  • Male: 40.7 to 50.3%
  • Female: 36.1 to 44.3%


cells/mcL = cells per microliter
gm/dL = grams per deciliter;
pg/cell = picograms per cell

Normal value ranges may vary slightly among different laboratories. Some labs use different measurements or test different samples. A doctor can tell about the meaning of your specific test results.

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