Absolute Lymphocyte Count (ALC) Calculator

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Total WBC from a complete blood count (CBC). Normal adult range is about 4.5-11.0 x10³/μL. Enter the value as reported by your lab (e.g. 7.0 means 7,000 cells/μL).
x10³/μL
The lymphocyte fraction of the WBC differential, reported as a percentage. Normal adults: 20-40%.
%
Reference ranges differ significantly with age. Younger children have much higher normal ALC values than adults.
Absolute Lymphocyte CountNormal
2,100cells/μL

WBC x lymphocyte%

ALC (x10³/μL)2.1
InterpretationNormal range
CD4 CorrelationALC ≥ 2,000: CD4 count likely ≥ 200 cells/μL (CD4 deficiency less probable)
2,100 cells/μL
Severe lymphopenia<500Lymphopenia500-1000Normal1000-4000Lymphocytosis4000+

ALC of 2100 cells/μL - within normal range.

  • Your ALC of 2100 cells/μL (2.10 x10³/μL) is within the normal range for your age group.
  • Normal lymphocyte counts suggest the adaptive immune system is quantitatively intact.
  • In adults, an ALC above 2,000 cells/μL makes CD4 deficiency (CD4 < 200) less probable, though direct measurement is still needed to confirm.

Next stepALC is one component of the CBC differential. Always interpret it alongside WBC, absolute neutrophil count, and clinical symptoms.

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