Heart & coagulation

D-dimer unit converter

Fibrin breakdown product (thrombosis and embolism screening)

Also known as: D-dimers, DD, Fibrin D-dimer, Fibrin degradation fragment, D-dimères, Dímero D

Converter

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

mg/L FEU = µg/mL FEU µg/L FEU = ng/mL FEU

Worked example

0.25 mg/L FEU (middle of the reference range) = 250 µg/L FEU

Conversion formulas

µg/L FEU = ng/mL FEU	µg/L FEU = mg/L FEU × 1000	mg/L FEU = µg/L FEU × 0.001

Reference range

Unit	Adults
mg/L FEU = µg/mL FEU	0 – 0.5
µg/L FEU = ng/mL FEU	0 – 500

Source: The 2019 European guidelines on pulmonary embolism illustrated with a case report (PMC) · Last reviewed: 2026-10-14

Note from the source: Normal reference below 500 ng/mL (= µg/L FEU); ESC 2019 allows an age-adjusted cut-off (age x 10 µg/L) above 50 years for non-high pretest probability. Results in D-dimer units (DDU) are about half of FEU

Frequently asked questions

How do I convert D-dimer from mg/L FEU to µg/L FEU?

µg/L FEU = mg/L FEU × 1000. In the other direction: mg/L FEU = µg/L FEU × 0.001.

What is the reference range of D-dimer?

For adults the range is 0 – 0.5 mg/L FEU (The 2019 European guidelines on pulmonary embolism illustrated with a case report (PMC)). Reference ranges differ between laboratories and partly by sex and age; use the range printed on your lab report.

Which units are used for D-dimer?

Common units are mg/L FEU, µg/L FEU.