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Immunoglobulin A (IgA) Unit Converter
Immunoglobulin A (IgA) is the principal antibody class found in the body’s mucosal secretions (saliva, tears, respiratory and gastrointestinal tracts). It plays a crucial role in mucosal immunity, acting as the first line of defense to neutralize pathogens and prevent their adherence to epithelial surfaces.
Clinically, serum IgA levels are measured to diagnose immune deficiencies (low levels, such as Selective IgA Deficiency, the most common primary immunodeficiency) and to monitor autoimmune and chronic inflammatory diseases (high levels). IgA testing is also integral to screening for Celiac Disease (alongside IgA tissue transglutaminase antibodies). This converter facilitates switching between the SI standard (g/L) and the conventional mass unit (mg/dL).
SI Units
RecommendedGrams per liter or Micromoles per liter.
Conventional Units
Clinical Context
Reference Range (Adults): Typically 70 – 400 mg/dL (0.7 – 4.0 g/L). The primary form measured is the IgA monomer.
Low IgA levels confirm Selective IgA Deficiency, which makes individuals susceptible to respiratory and gastrointestinal infections. High IgA levels are associated with liver cirrhosis and inflammatory bowel disease. The molar conversion relies on MW 160,000 g/mol: 1 g/L ≈ 6.25 µmol/L.
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., mg/dL). You can use either dot or comma decimals.
Automatic Conversion
The calculator works in real-time. As you type in one field, all other units (like g/L and µmol/L) are instantly updated.
Verify Units
Check the SI Units section. Note that g/L is 100 times the numerical value of mg/dL.
Reset
Use the Clear button to reset all fields before starting a new calculation.
Frequently Asked Questions & Tips
Yes. mg/dL and mg% are numerically identical.
Selective IgA Deficiency is the most common primary immunodeficiency disorder, often characterized by frequent sinus, lung, and gastrointestinal infections.