Cholesterol Conversion Calculator

Cholesterol Conversion Calculator for Endocrinology. The two outputs describe the same concentration. This is not a risk calculation and does not turn an abnormal result into a normal one.

For shared guidance on choosing a tool and documenting results, read the clinical calculator workflow.

How this calculator works

For total, HDL and LDL cholesterol, mg/dL = mmol/L x 38.67; reverse by dividing by 38.67. The same factor applies to a difference of cholesterol concentrations such as non-HDL. Source: https://www.ncbi.nlm.nih.gov/books/NBK83505/?report=reader.

When to use this calculator

Compare a cholesterol result reported in a different unit system. Select the direction before entering the number and keep the original laboratory report.

Inputs used

  • Conversion direction
  • Cholesterol concentration in the chosen starting units

Clinical interpretation

The two outputs describe the same concentration. This is not a risk calculation and does not turn an abnormal result into a normal one.

Worked example

193.35 mg/dL / 38.67 = 5.00 mmol/L. Reversing direction, 5 x 38.67 = 193.35 mg/dL. For 200 mg/dL the unrounded result is 5.1719679338 mmol/L; repeatedly converting a rounded 5.17 gradually loses precision.

Limitations and safety notes

Do not use this factor for triglycerides, glucose or HbA1c. Those are different quantities. No fasting requirement, lipid target or prescribing recommendation is inferred from a unit conversion. The source is a 2011 AHRQ appendix used for stable conversion factors, not current treatment guidance.

Frequently asked questions

Does the page convert triglycerides?

No. The cholesterol molecular conversion factor is not a generic lipid factor.

References

  • AHRQ, Lipid Conversion Factors, 2011. https://www.ncbi.nlm.nih.gov/books/NBK83505/?report=reader

Editorial review and citation methodology

Maintained by the Quick Medical Calculator Editorial Team. Content record date: September 9, 2026. A content date is not evidence of independent clinical review. Individual clinical sign-off is not recorded on this page.

  • Prefer original validation studies for scoring systems and prediction tools.
  • Use current specialty society guidance, transplant allocation policy, public health guidance, or regulator resources when they govern clinical use.
  • Include limitations and safety notes when a calculator is population-specific, context-dependent, or unsuitable as a standalone decision tool.

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