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Absolute Lymphocyte Count (ALC) = WBC x (lymphocyte % / 100), the standard published formula for converting a differential lymphocyte percentage into an absolute count. Commonly cited normal adult reference range is roughly 1,000-4,800 cells/uL. Pure arithmetic on given lab values. For general reference and educational purposes only — not a medical diagnosis. Consult a doctor for actual interpretation of a complete blood count with differential.
How it works
Enter your WBC count (x10^9/L) and the lymphocyte percentage from your differential. The tool multiplies them to get the absolute lymphocyte count in cells/uL and compares it to the standard reference range.
- Enter wBC count (x10^9/L, i.e. x10^3/uL).
- Enter lymphocytes on differential (%).
- Click Calculate to see your results.
Examples
WBC 7.0, Lymphocytes 30%
ALC = 7,000 x 0.30 = 2,100 cells/uL — within the commonly cited normal range of 1,000-4,800 cells/uL.
Who should use it
- Reviewing a CBC with differential.
- Immunology and oncology education.
Industry applications
- Hematology and immunology reference
- Clinical education
Advantages
- Simple, standard formula.
- Quick reference against a normal range.
Limitations
- Reference ranges vary slightly by lab and age.
- Does not replace clinical interpretation.
Common mistakes to avoid
- Entering WBC in the wrong units (cells/uL instead of x10^9/L), which inflates the result 1000-fold.
Best practices
- Use the WBC count and differential percentage from the same blood draw/report.
Tips
- ALC is often tracked over time (a trend) rather than judged from a single value.