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Immunoglobulin G (IgG) Unit Converter
Immunoglobulin G (IgG) is the most abundant antibody (immunoglobulin) class found in human blood plasma. IgG provides the majority of antibody-based immunity against invading pathogens and is the only antibody class capable of crossing the placenta, providing passive immunity to the fetus.
Clinically, serum IgG levels are measured to assess the general competency of the adaptive immune system. Low levels are indicative of Primary Immunodeficiency (like CVID) or secondary immunodeficiency. High levels can suggest chronic infection, autoimmune disease, or monoclonal gammopathy. This converter facilitates accurate 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 the highest immunoglobulin concentration, ranging from 700 – 1600 mg/dL (7.0 – 16.0 g/L).
Low IgG levels are the main finding in Common Variable Immunodeficiency (CVID). High IgG levels are often non-specific but may suggest chronic inflammation or polyclonal hypergammaglobulinemia. The molar conversion relies on MW 150,000 g/mol: 1 g/L ≈ 6.67 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., g/L). 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 mg/dL 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.
Multiply g/L by 100 to get mg/dL. (1 g/L = 100 mg/dL).