LDL Cholesterol Unit Converter (mg/dL ↔ mmol/L)

Convert LDL cholesterol between mg/dL and mmol/L in either direction. Enter a value and the result updates instantly. This page performs unit conversion and cites where the factor and the reference intervals come from; it does not interpret your value.

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The LDL conversion factor and where it comes from

LDL ("low-density lipoprotein") cholesterol is one of the lipid fractions reported on a standard lipid panel. LDL cholesterol is reported in mg/dL on U.S. lab reports and in mmol/L on UK, Canadian, Australian, and most European reports.

The standard conversion factor for LDL cholesterol is 0.02586, applied as mg/dL × 0.02586 = mmol/L (and mmol/L ÷ 0.02586 = mg/dL in reverse). The 0.02586 factor is shared by LDL, HDL, VLDL, and total cholesterol because all four are reported as the mass of the same cholesterol molecule (molecular weight 386.65 g/mol). Source: AMA Manual of Style / UK Kidney Association SI conversion table.

Published reference intervals

The intervals below are reproduced from U.S. National Library of Medicine, MedlinePlus: LDL cholesterol. They are listed here for unit reference only. Whether any value is in range for you depends on your laboratory's own reference range and your clinical context, so read them alongside your report and your healthcare provider, not in place of either.

Categorymg/dLmmol/L
OptimalLess than 100 mg/dLLess than 2.59 mmol/L
Near optimal100-129 mg/dL2.59-3.34 mmol/L
Borderline high130-159 mg/dL3.37-4.12 mmol/L
High160-189 mg/dL4.14-4.89 mmol/L
Very high190 mg/dL and above4.91 mmol/L and above

Pre-computed LDL conversions

Dedicated answer pages for the LDL values people search for most. Each shows the answer, the math, and a table of nearby values.

mg/dL to mmol/L

mmol/L to mg/dL

Common questions

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

Multiply by 0.02586: mg/dL × 0.02586 = mmol/L. To go the other way, divide by 0.02586 (or multiply by 38.67).

What is the LDL cholesterol conversion factor?

0.02586. The 0.02586 factor is shared by LDL, HDL, VLDL, and total cholesterol because all four are reported as the mass of the same cholesterol molecule (molecular weight 386.65 g/mol).

Where is mg/dL used and where is mmol/L used?

LDL cholesterol is reported in mg/dL on U.S. lab reports and in mmol/L on UK, Canadian, Australian, and most European reports.

Related converters and reference

Medical Disclaimer: This page converts units and cites published reference intervals. It is not a clinical interpretation. Whether any LDL cholesterol value is within range for you depends on your laboratory's reference range, your individual baseline, and clinical context. Discuss specific results with your healthcare provider.

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