White Blood Cell Count
The reference ranges provided here represent a theoretical guideline that should not be used to interpret your test results. Some variation is likely between these numbers and the reference range reported by the lab that ran your test. Please consult your doctor. For more information on reference ranges, please read Reference Ranges and What They Mean.
|Age||Conventional Units2||SI Units3|
|0-18 years||Not available due to wide variability. See child's lab report for reference range.|
|Adult||4,500-11,000 white blood cells per microliter (mcL)||4.5-11.0 x 109 per liter (L)|
1 from Wintrobe's Clinical Hematology. 12th ed. Greer J, Foerster J, Rodgers G, Paraskevas F, Glader B, Arber D, Means R, eds. Philadelphia, PA: Lippincott Williams & Wilkins: 2009.
2 Conventional Units are typically used for reporting results in U.S. labs
3 SI Units are used to report lab results outside of the U.S.