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Eosinophil Count Calculator
Eosinophils are white blood cells responsible for combating multicellular parasites and certain infections. They also control mechanisms associated with allergy and asthma.
Laboratory reports often provide the Eosinophil Percentage (%) from the differential. However, the clinical definition of Eosinophilia relies on the Absolute Eosinophil Count (AEC). A high percentage in a patient with a low total WBC count might result in a normal absolute count, whereas a normal percentage in a patient with leukocytosis could indicate significant eosinophilia. This calculator derives the Absolute Count from the Total WBC and Percentage.
Input Values
RequiredEnter Total White Cell Count and Eosinophil %.
Absolute Eosinophil Count
Clinical Context
Calculation Formula: Absolute Count = (Total WBC × Eosinophils %) / 100
Interpretation:
• Normal: 50–500 cells/µL (0.05–0.5 × 10⁹/L)
• Mild Eosinophilia: 500–1500 cells/µL
• Moderate: 1500–5000 cells/µL
• Severe (Hypereosinophilia): > 5000 cells/µL
Clinical References
How to Use This Calculator
Follow these steps to calculate the absolute count.
Enter Total WBC
Input the Total White Blood Cell count from the CBC (usually in 10⁹/L or K/µL).
Enter Percentage
Input the Eosinophil percentage from the differential.
Get Absolute Count
The calculator instantly provides the Absolute Eosinophil Count (AEC) in both cells/µL and SI units.