Calculate absolute white blood cell counts from differential percentages and total WBC count for complete blood count analysis
Total Percentage Check
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Neutrophils (Absolute)
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Lymphocytes (Absolute)
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Monocytes (Absolute)
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Eosinophils (Absolute)
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Basophils (Absolute)
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A WBC differential is a blood test that measures the percentage of each type of white blood cell in your blood sample. It includes neutrophils, lymphocytes, monocytes, eosinophils, and basophils.
Absolute counts are calculated by multiplying the total WBC count by the percentage of each cell type and dividing by 100. For example, if total WBC is 7000 and neutrophils are 60%, the absolute neutrophil count is 7000 × 60 ÷ 100 = 4200 cells/μL.
Normal ranges vary by age but typically: Neutrophils 50-70%, Lymphocytes 20-40%, Monocytes 2-8%, Eosinophils 1-4%, and Basophils 0.5-1%. These percentages should add up to 100%.
Absolute counts provide the actual number of each cell type per microliter of blood, which is more clinically significant than percentages alone. A high percentage might actually represent a low absolute count if the total WBC is low.
WBC differential percentages should always total 100%. If they don't, there may be an error in the lab results or other cell types present that weren't counted in the standard differential.
A WBC differential is often ordered as part of a complete blood count (CBC) to help diagnose infections, immune system disorders, blood cancers, or to monitor treatment effectiveness.