Absolute Lymphocyte Count Calculator
This calculator estimates the Absolute Lymphocyte Count (ALC) using the white blood cell count and lymphocyte percentage from a complete blood count.
Formula:
ALC = WBC × lymphocyte % × 10
Result
Clinical note:
ALC does not replace CD4 testing. CD4 count is measured directly by
immunophenotyping/flow cytometry and should be interpreted by a qualified
clinician, especially in patients with HIV or suspected immune suppression.
References
- Shapiro NI, et al. Absolute lymphocyte count as a predictor of CD4 count. Annals of Emergency Medicine. 1998.
- Napoli AM, et al. Absolute lymphocyte count in the emergency department predicts a low CD4 count in admitted HIV-positive patients. Academic Emergency Medicine. 2011.
- CDC. Guidelines for the Performance of CD4+ T-Cell Determinations in Persons with Human Immunodeficiency Virus Infection.
- MedlinePlus. CD4 Lymphocyte Count. U.S. National Library of Medicine.
