Proteins & inflammation

C4 unit converter

Complement protein (immune system)

Also known as: Complement C4, Complement component 4, Komplement C4, Komplementfaktor C4, Complemento C4

Converter

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

g/L mg/dL mg/L

Worked example

0.3 g/L (middle of the reference range) = 30 mg/dL

Conversion formulas

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

Reference range

Unit	Adults
g/L	0.15 – 0.45
mg/dL	15 – 45
mg/L	150 – 450

Source: MedlinePlus (NLM): Complement component 4 · Last reviewed: 2026-10-14

Note from the source: 15-45 mg/dL (0.15-0.45 g/L) (MedlinePlus)

Frequently asked questions

How do I convert C4 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 C4?

For adults the range is 0.15 – 0.45 g/L (MedlinePlus (NLM): Complement component 4). Reference ranges differ between laboratories and partly by sex and age; use the range printed on your lab report.

Which units are used for C4?

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