What is the normal white blood cell count range?

The normal range of white blood cells is 4,500 to 10,000 per microliter of blood, according to MedlinePlus. Because labs may vary slightly in their normal ranges, it is advisable to consult a physician regarding WBC test results.

White blood cells are cells that help fight infection, as reported by MedlinePlus. The number of these cells is measured by blood tests. These tests reveal the total count and various types white blood cells. Low white blood cell counts can indicate bone problems, liver disease or viral illnesses, while high counts may signify bacterial infections, anemia, or severe physical or mental stress.