Absolute Eosinophil Count Calculator

Created by Małgorzata Koperska, MD
Reviewed by Bogna Szyk and Steven Wooding
Based on research by
Kovalszki A, Weller PF. Eosinophilia. Primary Care: Clinics in Office Practice (October 2016)See 1 more source
Huang J, Zhang Z, Liu S, Gong C, Chen L, Ai G, Zhu X, Zhang C, Li D. Absolute Eosinophil Count Predicts Intensive Care Unit Transfer Among Elderly COVID-19 Patients From General Isolation Wards. Frontiers in Medicine (November 2020)
Last updated: Aug 09, 2022

The absolute eosinophil count calculator uses white blood cell count and eosinophil percentage to estimate the total number of acidophilic cells in your blood.

You might be interested in our other calculators regarding white blood cells: ANC – absolute neutrophil count calculator and absolute lymphocyte count calculator.

What are eosinophils?

They are white blood cells specialized in fighting parasites and certain diseases.
They are also mediators of allergic responses and are associated with bronchial asthma development – they are used as markers of severity of the disease.

The name eosinophil or acidophil relates to the fact that this particular group is acid-loving: they show their affinity for acids by turning bright red after staining with eosin, an acidic red dye used in the standard procedure of microscope probe preparation.

What is a normal range of total eosinophil count?

The normal total eosinophil count range is 0.04-0.45 × 10³ cells/μL.

  • The state of eosinophil count elevation over 0.45 × 10³ cells/μL is called eosinophilia and is linked to allergic reactions and parasitic infections.

  • Hypereosinophilia is a state of elevation over 1.5 × 10³ cells/μL and can be due to the growth of mutant eosinophil cells or severe parasitosis or allergic reactions.

  • A total eosinophil count lower than 0.04 , called eosinopenia, can be associated with acute infections, burns, stress reactions, Cushing's syndrome, and use of large doses of steroids.

What formula does the absolute eosinophil count calculator use?

To estimate the total eosinophil count (AEC), you first need to do a complete blood count (CBC). The values of white blood cell (WBC) count and eosinophil percentage (EOS%) are then used in this equation that finds the total eosinophil count:


The calculated absolute eosinophil count is expressed in thousands of cells per microlitre (10³ cells/μL).

💡 Another white blood cell calculator that might be useful to you is our ANC calculator without bands.

Małgorzata Koperska, MD
White blood cells (WBC)
Absolute eosinophil count
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