Absolute Eosinophil Count
AEC
- Sample
- Blood
- Usual units
- thousand/µL
Also known as AEC · Absolute Eosinophils · Eosinophils Absolute · Eosinophil Absolute Count · Absolute Eosinophil
What this test measures
The absolute eosinophil count is the number of eosinophils in a volume of blood. It is commonly reported as thousands of cells per microliter.
Reading your report
There isn’t one standard range for this test — each lab prints its own. Use the range shown next to your result.
Related guides
- Guide
Why the same blood test has different "normal" ranges at different labs
Reference intervals are built from each lab's own population and equipment, which is why two labs can print different ranges for the same sample.
- Guide
Reference interval, cutoff, and the "optimal" numbers online: three different things
The range beside your result, the target a website quotes, and the threshold that defines a condition are built in different ways and answer different questions.
- Guide
Why the same lab printed a different reference range for you this year
Ranges are not fixed constants. The lab can change method, revise its reference group, or apply a range that depends on your age — none of which is an error.
- Guide
The differential: why white cells are printed as both a percentage and a count
Five types of white blood cell, each reported twice — once as a share of the total and once as an absolute number. Why both columns exist and why they can disagree.