Triglycerides mg/dL → mmol/L

Convert triglycerides from mg/dL to mmol/L

Sources last checked: 2026-11-03

Triglycerides mg/dL → mmol/L

Convert triglycerides from mg/dL to mmol/L

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

Source: AMA Manual of Style, 11th ed. (Oxford Academic) — Units of measure converter, Table 2: Selected laboratory tests and conversion factors.Open

What is the Triglycerides mg/dL → mmol/L?

Triglycerides are reported in mg/dL by most labs in Germany, Austria, Turkey and the USA, and in mmol/L in the UK, Scandinavia, the Netherlands and much of the rest of Europe. This converter multiplies by 0.0113, the factor in the AMA Manual of Style SI table. Because serum triglycerides are a mixture of molecules, the factor rests on a conventional average molar mass (that of triolein) rather than on one exact compound.

When to use it

  • Converting a mg/dL lipid panel for use with SI-based guidelines, papers or risk tools
  • Comparing results from labs that report different units
  • Checking the triglyceride value before deciding whether a calculated LDL is reliable in a given unit system

When not to use it

  • Cholesterol fractions — they use the cholesterol factor (0.0259), not this one
  • Judging whether a value is normal or treatment-relevant: reference ranges and thresholds depend on the laboratory, fasting status and guideline

How it is calculated

Triglycerides (mmol/L) = triglycerides (mg/dL) × 0.0113

Clinical pearls and limitations

  • Converts units only; reference ranges depend on the laboratory, the assay and the patient.
  • The triglyceride factor (0.0113) is less than half the cholesterol factor (0.0259); using the wrong one is a common error when converting a whole lipid panel.
  • Triglycerides vary considerably with recent food intake; note whether the sample was fasting before comparing results.
  • The Friedewald LDL formula uses a different triglyceride divisor in mg/dL and in mmol/L; convert the inputs consistently and use the version that matches the unit.
  • Very high triglycerides can interfere with some other assays (lipaemic samples); the conversion itself is unaffected.

Frequently asked questions

How do I convert triglycerides from mg/dL to mmol/L?

Multiply by 0.0113. For example, 200 mg/dL × 0.0113 = 2.26 mmol/L.

What is 500 mg/dL triglycerides in mmol/L?

500 × 0.0113 = 5.65 mmol/L.

Why is the triglyceride factor different from the cholesterol factor?

The factor depends on molar mass. A triglyceride molecule (three fatty acids on glycerol) is much heavier than cholesterol, so each mg/dL corresponds to fewer millimoles.

Evidence and guidelines

  1. Primary source: AMA Manual of Style, 11th ed. (Oxford Academic) — Units of measure converter, Table 2: Selected laboratory tests and conversion factors.

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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.