Tumor markers

PSA unit converter

Prostate-specific antigen (prostate marker)

Also known as: Prostate-specific antigen, Total PSA, tPSA, Prostataspezifisches Antigen, Antigène prostatique spécifique, APE

Converter

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

ng/mL µg/dL ng/dL ng/L

Worked example

2 ng/mL (middle of the reference range) = 0.2 µg/dL

Conversion formulas

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

Reference range

Unit	Adults
ng/mL	0 – 4
µg/dL	0 – 0.4
ng/dL	0 – 400
ng/L	0 – 4000

Source: MedlinePlus (NLM): Prostate-specific antigen (PSA) blood test · Last reviewed: 2026-10-14

Note from the source: Up to 4.0 ng/mL is considered normal; below 2.5 ng/mL in most men in their 50s or younger; depends on age (MedlinePlus)

Frequently asked questions

How do I convert PSA from ng/mL to µg/dL?

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

What is the reference range of PSA?

For adults the range is 0 – 4 ng/mL (MedlinePlus (NLM): Prostate-specific antigen (PSA) blood test). Reference ranges differ between laboratories and partly by sex and age; use the range printed on your lab report.

Which units are used for PSA?

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