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

· Last updated：2026-08-12

This tool is for informational purposes only and does not constitute medical, financial, or legal advice; consult a qualified professional for advice.

Convert cholesterol and triglycerides between mg/dL and mmol/L. Factor depends on analyte: cholesterol 0.02586, triglycerides 0.01129. Derived from NCEP ATP III, ESC/EAS 2019, Young 1987, StatPearls. Not medical advice.

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Tool usage guide

Learn when to use this tool, what it supports, and how real users apply it.

Key facts

Category
Health
Input types
number, select
Output type
json
Sample coverage
4
API ready
Yes

Overview

Convert total, HDL, or LDL cholesterol and triglycerides between mg/dL and mmol/L using analyte-specific conversion factors. Enter a value, select the analyte and source and target units, then choose the desired decimal precision. This tool is for reference and is not medical advice.

When to use

  • Convert a cholesterol result from mg/dL to mmol/L for SI-unit reporting.
  • Convert triglycerides from mmol/L to mg/dL when comparing laboratory results.
  • Check equivalent total, HDL, or LDL cholesterol values with a selected number of decimal places.

How it works

  1. 1Enter the cholesterol or triglyceride value.
  2. 2Select Total Cholesterol, HDL Cholesterol, LDL Cholesterol, or Triglycerides.
  3. 3Choose the source unit and target unit: mg/dL or mmol/L.
  4. 4Set decimal places if needed and review the JSON conversion result.

Use cases

  • Laboratory professionals can compare lipid results reported in conventional and SI units.
  • Clinicians and cardiology teams can translate total, HDL, LDL, and triglyceride values between reporting systems.
  • Researchers and students can verify unit equivalents using analyte-specific factors and consistent rounding.

Examples

1. Convert total cholesterol to mmol/L

Laboratory professional

Background

A lipid result is reported as 200 mg/dL, but the receiving report uses mmol/L.

Problem

Find the equivalent total cholesterol concentration in mmol/L.

How to use

Enter 200 as the value, select Total Cholesterol, choose mg/dL as the source unit and mmol/L as the target unit, and keep Decimal Places at 2.

{"value":200,"analyte":"total","sourceUnit":"mgdl","targetUnit":"mmol","decimalPlaces":2}

Outcome

The result is 5.17 mmol/L, using the cholesterol factor 0.02586.

2. Convert triglycerides to mg/dL

Clinical data analyst

Background

A triglyceride result is recorded as 2.8 mmol/L and needs to be compared with a report using mg/dL.

Problem

Convert the triglyceride concentration without applying the cholesterol factor.

How to use

Enter 2.8 as the value, select Triglycerides, choose mmol/L as the source unit and mg/dL as the target unit, and use 2 decimal places.

FAQ

Which analytes can I convert?

You can convert total cholesterol, HDL cholesterol, LDL cholesterol, and triglycerides.

Which units are supported?

The converter supports mg/dL and mmol/L.

Are cholesterol and triglyceride conversion factors the same?

No. Cholesterol uses 0.02586, while triglycerides use 0.01129 when converting from mg/dL to mmol/L.

Can I control the number of decimal places?

Yes. Set Decimal Places from 0 to 8; the default is 2.

Is this tool medical advice?

No. It provides unit conversions for reference and does not replace professional medical advice.

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{"value":2.8,"analyte":"tg","sourceUnit":"mmol","targetUnit":"mgdl","decimalPlaces":2}

Outcome

The result is 248.01 mg/dL, using the triglyceride factor 0.01129.

3. Translate an LDL result between reporting systems

Health sciences student

Background

An LDL cholesterol value is available in mg/dL, while a study table uses mmol/L.

Problem

Obtain the equivalent LDL value with clear rounding.

How to use

Enter the LDL value, select LDL Cholesterol, set mg/dL as the source unit and mmol/L as the target unit, then choose the required decimal places.

Outcome

The converter returns the equivalent LDL concentration in mmol/L using the cholesterol conversion factor.