Liver & pancreas

Procollagen III N-terminal peptide (P3NP) unit converter

Marker of collagen III turnover (liver fibrosis)

Also known as: P3NP, PIIINP, N-terminal propeptide of type III procollagen

Converter

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

µg/L = ng/mL µg/dL ng/dL ng/L

Worked example

2.95 µg/L (middle of the reference range) = 0.295 µg/dL

Conversion formulas

µg/dL	µg/dL = µg/L × 0.1	µg/L = µg/dL × 10
ng/dL	ng/dL = µg/L × 100	µg/L = ng/dL × 0.01
ng/L	ng/L = µg/L × 1000	µg/L = ng/L × 0.001

Good to know

P3NP is reported in µg/L or ng/mL, which are numerically identical.

1 µg/L = 1 ng/mL.
Children and adolescents have higher values because their bones and tissues grow.

Reference range

Unit	Adults
µg/L = ng/mL	1.7 – 4.2
µg/dL	0.17 – 0.42
ng/dL	170 – 420
ng/L	1700 – 4200

Source: Newcastle Hospitals Laboratories: P3NP (N-terminal propeptide of type III procollagen), serum · Last reviewed: 2026-10-19

Note from the source: Adults (20-65 years) 1.7-4.2 µg/L (= ng/mL) (Newcastle Hospitals Laboratories); higher in children and growing adolescents. Assay-specific

Frequently asked questions

How do I convert Procollagen III N-terminal peptide (P3NP) from µg/L to µg/dL?

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

What is the reference range of Procollagen III N-terminal peptide (P3NP)?

For adults the range is 1.7 – 4.2 µg/L (Newcastle Hospitals Laboratories: P3NP (N-terminal propeptide of type III procollagen), serum). Reference ranges differ between laboratories and partly by sex and age; use the range printed on your lab report.

Which units are used for Procollagen III N-terminal peptide (P3NP)?

Common units are µg/L, µg/dL, ng/dL, ng/L.