WBC count

WBC Count: Everything You Need To Know

A WBC count or a white blood cell count is a test measuring the number of white blood cells in your body.


This test is done on a sample of blood. It does not require any special preparation.


Your doctor will take a sample of your blood through a needle attached to a syringe. Your doctor may also use a device called Vacutainer or EDTA tube to draw the sample. The sample is then sent to a laboratory for further testing.


WBC count is usually tested in one of two forms – absolute or differential WBC count.

  • Absolute WBC count: This is a simple test that determines the total number of white blood cells in a sample of blood.
  • Differential WBC count: This test is more complex and looks at the various types of white blood cells, as well as the ratio between them.

Risks/Side Effects

WBC test carries no risks or side effects as it is a simple blood test.

Why Is WBC Count Used?

Because WBCs are key components of the immune system, this test is useful to diagnose and assess the state of your body. WBC count increases in cases of infection, inflammation, autoimmune diseases, leukemia, and certain other conditions.

When Is WBC Count Used?

WBC count is usually done to diagnose and monitor autoimmune diseases, some types of cancer, infections, and other conditions. Your doctor may recommend a WBC count test if you have chances of infection or some other medical condition.

Normal Range of WBC Count

The normal range for WBC counts are between 4,500-10,000 WBCs per microliter of blood.