Proteins & inflammation

Alpha-1 antitrypsin unit converter

Protease inhibitor protein (lung and liver disease marker)

Also known as: AAT, A1AT

Converter

Enter a value in any unit and all other units fill in.

g/L mg/dL g/dL mg/L

Worked example

1.6 g/L (middle of the reference range) = 160 mg/dL

Conversion formulas

mg/dL	mg/dL = g/L × 100	g/L = mg/dL × 0.01
g/dL	g/dL = g/L × 0.1	g/L = g/dL × 10
mg/L	mg/L = g/L × 1000	g/L = mg/L × 0.001

Reference range

Unit	Adults
g/L	1 – 2.2
mg/dL	100 – 220
g/dL	0.1 – 0.22
mg/L	1000 – 2200

Source: GeneReviews (NCBI Bookshelf): Alpha-1 antitrypsin deficiency · Last reviewed: 2026-10-14

Note from the source: Normal serum levels about 20-53 µmol/L, i.e. 100-220 mg/dL by nephelometry; ZZ genotype 20-35 mg/dL

Frequently asked questions

How do I convert Alpha-1 antitrypsin from g/L to mg/dL?

mg/dL = g/L × 100. In the other direction: g/L = mg/dL × 0.01.

What is the reference range of Alpha-1 antitrypsin?

For adults the range is 1 – 2.2 g/L (GeneReviews (NCBI Bookshelf): Alpha-1 antitrypsin deficiency). Reference ranges differ between laboratories and partly by sex and age; use the range printed on your lab report.

Which units are used for Alpha-1 antitrypsin?

Common units are g/L, mg/dL, g/dL, mg/L.