Absolute Lymphocyte Count
Input total white blood cell count and lymphocyte percentage (%) to obtain the ALC expressed in cells/µL.
Enter percentage from manual or automated differential (e.g., 32% → 32).
Absolute lymphocyte count
1920 cells/µL
Within reference range
Absolute lymphocyte count 1000–4000 cells/µL lies within typical adult reference range. Interpret alongside clinical context.
How to Use This Calculator
Collect laboratory values
Use a complete blood count with differential to obtain the total WBC count and lymphocyte percentage.
Input measurements
Enter WBC in cells/µL and lymphocytes as a percentage. The calculator converts these to an absolute value automatically.
Interpret the result
Review the category (normal, lymphopenia, lymphocytosis) and correlate with clinical findings or additional testing.
Formula
ALC (cells/µL) = Total WBC (cells/µL) × Lymphocytes (%) ÷ 100
Example: WBC 6000, lymphocytes 32% → 6000 × 32 ÷ 100 = 1920 cells/µL.
Full Description
Absolute lymphocyte count is a key parameter for evaluating immune competence. Decreased counts may reflect acute illness, immunosuppressive therapy, or chronic infections, whereas elevated counts often accompany viral illnesses or lymphoproliferative disorders. Monitoring trends helps assess treatment response and disease progression.
Frequently Asked Questions
What is the normal range for ALC?
Laboratory ranges vary, but typical adult reference range is approximately 1000–4000 cells/µL.
How does age affect ALC?
Infants and young children have higher lymphocyte counts; consult pediatric reference ranges. Older adults may have lower baseline counts.
Can medications alter the result?
Yes. Corticosteroids, chemotherapy, and immunosuppressants commonly reduce lymphocyte counts. Interpret results in medication context.
When should further evaluation be pursued?
Persistent lymphopenia or lymphocytosis, especially with symptoms, warrants diagnostic workup (infectious, autoimmune, hematologic).