Immunology & cytokines

Complement C1q unit converter

First component of the classical complement pathway

Also known as: C1q, C1q level

Converter

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

mg/dL mg/L g/L

Worked example

165 mg/L (middle of the reference range) = 16.5 mg/dL

Conversion formulas

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

Good to know

Complement C1q is reported in mg/L or in mg/dL.

mg/dL × 10 = mg/L (exact factor 10).
Low values occur in rare inherited deficiencies and in some lupus-like diseases.

Reference range

Unit	Adults
mg/dL	7.9 – 25.1
mg/L	79 – 251
g/L	0.079 – 0.251

Source: Newcastle Hospitals Laboratories: C1q levels · Last reviewed: 2026-10-19

Note from the source: 79-251 mg/L (Newcastle Hospitals Laboratories); assay-specific

Frequently asked questions

How do I convert Complement C1q from mg/L to mg/dL?

mg/dL = mg/L × 0.1. In the other direction: mg/L = mg/dL × 10.

What is the reference range of Complement C1q?

For adults the range is 79 – 251 mg/L (Newcastle Hospitals Laboratories: C1q levels). Reference ranges differ between laboratories and partly by sex and age; use the range printed on your lab report.

Which units are used for Complement C1q?

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