Browse Medical Laboratory Calculators
Immunoglobulin E (IgE) Unit Converter
Immunoglobulin E (IgE) is an antibody class found in low concentrations in the serum but with potent biological effects. IgE antibodies are responsible for initiating Type I Hypersensitivity reactions, binding to mast cells and basophils to trigger the release of mediators (like histamine) that cause allergic symptoms.
Clinically, measuring Total IgE levels is used to screen for allergic diseases (atopy), monitor severe asthma, and aid in the diagnosis of parasitic infections (helminths), which typically cause a massive elevation in IgE production. Results are reported in International Units (IU/mL or kIU/L). This converter handles the standard activity and mass unit conversions.
Activity Units
RecommendedInternational Units per milliliter (Numerically 1:1).
Mass Equivalents
Clinical Context
Reference Range (Adults): Typically < 100 IU/mL (or < 240 ng/mL). Levels are highly age- and assay-dependent.
Levels often exceed 1000 IU/mL in cases of severe allergic asthma or hyper-IgE syndrome. Since IgE is an activity unit, mass conversion is standardized by the WHO: 1 IU/mL ≈ 2.4 ng/mL.
Clinical References
How to Use This Calculator
Follow these steps to get accurate clinical conversions instantly.
Enter Values
Input your laboratory results into the corresponding unit field (e.g., IU/mL). You can use either dot or comma decimals.
Automatic Conversion
The calculator works in real-time. Conversions cover both activity (IU/mL) and mass (ng/mL).
Verify Units
Check the Activity Units section. IU/mL is numerically identical to kIU/L.
Reset
Use the Clear button to reset all fields before starting a new calculation.
Frequently Asked Questions & Tips
Yes. The units are numerically equivalent: 1 IU/mL = 1000 IU/L = 1 kIU/L.
The mass is calculated using the WHO standard: 1 IU ≈ 2.4 ng.