Aisha K.
Mar 12, 2026
Clean layout and the results update instantly. Exactly what I needed for a quick planning check.
Unit Converters
Cholesterol: mg/dL to mmol/L Converter
mmol/L = mg/dL ÷ 38.67 for cholesterol (not triglycerides).
Total cholesterol: mmol/L = mg/dL ÷ 38.67. A US 200 mg/dL is 5.2 mmol/L. Triglycerides use ÷ 88.57 — wrong factor, wrong lecture. LDL/HDL use the cholesterol factor.
Cholesterol
mg/dL → mmol/L
5.17 mmol/L
200 mg/dL → 5.17 mmol/L. 100 mg/dL HDL → 2.59 mmol/L.
- You typed
- 200 mg/dL
- One mmol/L is
- 38.67 mg/dL
- How it’s calculated
- mmol/L = mg/dL ÷ 38.67 for cholesterol (not triglycerides).
Plain-English guide
Terms & how it works
Confused by a field? Read the short definitions here while you use the tool.
Cholesterol
The “Cholesterol” value used in this tool’s formula. Adjust it to see results update live.
How this calculator works
Total cholesterol: mmol/L = mg/dL ÷ 38.67. A US 200 mg/dL is 5.2 mmol/L. Triglycerides use ÷ 88.57 — wrong factor, wrong lecture. LDL/HDL use the cholesterol factor. mmol/L = mg/dL ÷ 38.67 for cholesterol (not triglycerides). Example: 200 mg/dL → 5.17 mmol/L. 100 mg/dL HDL → 2.59 mmol/L.
mmol/L = mg/dL ÷ 38.67 for cholesterol (not triglycerides).
Example: 200 mg/dL → 5.17 mmol/L. 100 mg/dL HDL → 2.59 mmol/L.
When to use this Cholesterol mg/dL to mmol/L
Common use cases
- Total cholesterol: mmol/L = mg/dL ÷ 38.67. A US 200 mg/dL is 5.2 mmol/L. Triglycerides use ÷ 88.57 — wrong factor, wrong lecture. LDL/HDL use the cholesterol factor.
- Sanity-check with this case: 200 mg/dL → 5.17 mmol/L. 100 mg/dL HDL → 2.59 mmol/L.
- The relationship is: mmol/L = mg/dL ÷ 38.67 for cholesterol (not triglycerides).
Localized examples
- Unit Converters: the example on this page uses the same formula as the widget.
What you get
- Fields: Cholesterol
- mmol/L = mg/dL ÷ 38.67 for cholesterol (not triglycerides).
- Example on the page: 200 mg/dL → 5.17 mmol/L. 100 mg/dL HDL → 2.59 mmol/L.
How to Convert Cholesterol mg/dL to mmol/L Step-by-Step
- 1Enter Cholesterol. Use the values you have, not a catalog average, unless that is all you know.
- 2mmol/L = mg/dL ÷ 38.67 for cholesterol (not triglycerides).
- 3Worked case: 200 mg/dL → 5.17 mmol/L. 100 mg/dL HDL → 2.59 mmol/L.
- 4Check which dictionary the other person is using — US or UK, decimal or 1,024 — then trust the number.
Governing formula
mmol/L = mg/dL ÷ 38.67 for cholesterol (not triglycerides).
200 mg/dL → 5.17 mmol/L. 100 mg/dL HDL → 2.59 mmol/L.
Example: set Cholesterol = 200, then read the result.
Variable definitions
- value
Cholesterol
The “Cholesterol” field. Default 200; typical range 50–500.
- The conversion (mmol/L = mg/dL ÷ 38.67 for cholesterol (not triglycerides).) does not pick US vs UK gallons, SI vs binary megabytes, or Mach at altitude for you. Read the footnote on the page.
- Nothing here is uploaded for the calculation itself.
Frequently Asked Questions
Divide mg/dL by 88.57. This page will lie if you use it on trigs.
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4.8
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4 reviews
Daniel R.
Feb 28, 2026
Very usable on mobile. Would love a save/export option later, but the math feels solid.
Priya S.
Feb 3, 2026
The FAQ section answered my questions before I even had to search. Smooth dark mode too.
Marcus L.
Jan 19, 2026
Simple inputs, clear outputs. This replaced three bookmarks I used to juggle.
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