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D-dimer ng/mL → µg/mL

Convert d-dimer from ng/mL to µg/mL

Sources last checked: 2026-11-03

D-dimer ng/mL → µg/mL

Convert d-dimer from ng/mL to µg/mL

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Converts units only; reference ranges depend on the laboratory, the assay and the patient.

Source: BIPM. The International System of Units (SI), 9th edition, 2019 — Table 8 (non-SI units accepted for use with the SI, incl. litre) and the definition of the kelvin and degree Celsius.Open

What is the D-dimer ng/mL → µg/mL?

This converter turns a D-dimer result in ng/mL (= µg/L) into µg/mL (= mg/L) by dividing by 1000. Which unit appears on a report depends on the laboratory and the assay. The FEU or DDU basis of the result stays the same and has to be read from the report.

When to use it

  • Comparing a ng/mL result with guidelines or papers that use µg/mL or mg/L
  • Entering a value into a tool that expects mg/L FEU
  • Checking serial values after a change of reporting unit

When not to use it

  • Switching between FEU and DDU
  • Comparing values from different D-dimer assays

How it is calculated

D-dimer (µg/mL) = D-dimer (ng/mL) ÷ 1000

Clinical pearls and limitations

  • Converts units only; reference ranges depend on the laboratory, the assay and the patient.
  • µg/mL = ng/mL ÷ 1000; µg/L and ng/mL are the same number.
  • Many errors come from mixing up µg/L and mg/L: they differ by a factor of 1000, whereas µg/L and ng/mL are identical.
  • Assay-specific cut-offs, including age-adjusted ones, must be used in the unit and basis in which they were validated.
  • A negative D-dimer is informative only within a validated pretest-probability strategy.

Frequently asked questions

How do I convert D-dimer from ng/mL to µg/mL?

Divide by 1000. Example: 640 ng/mL = 0.64 µg/mL; 2300 ng/mL = 2.3 µg/mL.

Is ng/mL the same as µg/L?

Yes. Both mean one millionth of a gram per litre, so the number is identical. In the same way, µg/mL equals mg/L.

Why does the same D-dimer look so different on two reports?

Three things can change at once: the unit (ng/mL or µg/mL), the basis (FEU or DDU, about a factor of two) and the assay itself. Check all three before concluding that the value has changed.

Evidence and guidelines

  1. Primary source: BIPM. The International System of Units (SI), 9th edition, 2019 — Table 8 (non-SI units accepted for use with the SI, incl. litre) and the definition of the kelvin and degree Celsius.

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<iframe src="https://medelix.ai/en/embed/d-dimer-ngml-to-ugml" title="D-dimer ng/mL → µg/mL – Medelix" width="100%" height="620" style="border:0;max-width:720px" loading="lazy"></iframe> <p><a href="https://medelix.ai/en/calculators/d-dimer-ng-ml-to-ug-ml">D-dimer ng/mL → µg/mL calculator by Medelix</a></p>

For healthcare professionals and medical students. These tools support, and do not replace, clinical judgement. Always check results against the original source and your local protocols.