Convert a white cell count and eosinophil percentage into an absolute eosinophil count, with standard interpretation bands.
Absolute eosinophil count (cells/µL)
How to use this tool
Use the white blood cell count from your lab report, in ×10³/µL (thousands per microlitre).
This is the eosinophil share of the differential white cell count.
The tool multiplies the two to give the absolute count in cells/µL.
Under 500 cells/µL is usually normal; higher bands are described, not diagnosed, here.
Formula & worked example
WBC 7.0 ×10³/µL with 3% eosinophils gives an AEC of 210 cells/µL — within the usual 0–500 range.
Limitations — read this before you rely on it
Reference ranges vary by laboratory, age and assay; this tool uses the common adult 0–500 cells/µL range. It does not diagnose the cause of a raised count. This tool is not medical advice — discuss any abnormal result with a clinician.
Frequently asked questions
The actual number of eosinophil white blood cells per microlitre of blood, calculated from the total WBC and the eosinophil percentage.
Roughly 0–500 cells/µL for adults, though your lab's own range governs.
Allergy and asthma, parasitic infection, drug reactions, skin disease and some blood disorders, among others — the number alone cannot tell which.
Mild, transient rises are common (for example with allergy). Persistent or very high counts deserve clinician review.
Yes — divide it by 1,000 first to get ×10³/µL, then enter that value.