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US to Australian Cholesterol Converter: mg/dL to mmol/L

Convert mg/dL to mmol/L as you type.

Cholesterol Converter Australia: mmol/L ↔ mg/dL
1 mg/dL ≈ 0.0258598397 mmol/L

Reference for one unit; displayed values may be rounded.

mg/dL

Milligrams per Deciliter

Use a dot or comma for decimals, without thousands separators.

mmol/L

Millimoles per Liter

Display rounding does not improve the accuracy of your original measurement. Very large or very small results use scientific notation.

Method and source

This tool changes units only. It does not interpret test results or provide a diagnosis.

mg/dL to mmol/L Conversion Formula

To convert cholesterol from milligrams per decilitre to millimoles per litre, divide the mg/dL value by 38.67, or equivalently multiply by 0.02586. The divisor reflects the molar mass of cholesterol, about 386.7 grams per mole.

1 mg/dL ≈ 0.0258598397 mmol/L

Milligrams per Deciliter and Millimoles per Liter Explained

Milligrams per Deciliter (mg/dL)

Milligrams per decilitre is the mass-based unit for blood cholesterol on US lab reports: it counts the milligrams of cholesterol carried in each 100 millilitres of blood. Because the cholesterol is weighed rather than counted, values run high — desirable total cholesterol stays under 200 mg/dL, risky readings climb past 240 mg/dL, and LDL targets such as 100 mg/dL appear throughout American guidelines.

Where it is used: The default on US lipid panels and in much of the American cardiology literature you will find online.

Origin: Descended from early twentieth-century American clinical chemistry, which standardized results as measured weight per volume of serum and retained the convention after the rest of the world went SI.

Millimoles per Liter (mmol/L)

Millimoles per litre is the SI unit for blood cholesterol, stating how many millimoles are dissolved in a litre of plasma. One millimole is roughly 602 sextillion molecules, so the unit measures particle count instead of mass. The resulting numbers are compact — most lipid panels land between 2 and 8 mmol/L — which is why an Australian or European report looks so much smaller than the equivalent US figure.

Where it is used: Standard on lipid panels across Australia, New Zealand, the United Kingdom, Canada, and continental Europe.

Origin: Arrived with the SI-unit modernisation of clinical laboratories in the 1970s and 1980s, replacing mass-based reporting nearly everywhere except the United States — Australian pathology labs made the switch during this period.

mg/dL to mmol/L Cholesterol Conversion Table

Select a value to use it in the calculator.

Milligrams per Deciliter (mg/dL) Millimoles per Liter (mmol/L)
1.0343935868 mmol/L
1.2929919834 mmol/L
1.5515903801 mmol/L
1.8101887768 mmol/L
2.0687871735 mmol/L
2.5859839669 mmol/L
3.1031807603 mmol/L
3.361779157 mmol/L
3.6203775537 mmol/L
3.8789759503 mmol/L
4.137574347 mmol/L
4.3961727437 mmol/L
4.6547711404 mmol/L
4.9133695371 mmol/L
5.1719679338 mmol/L
5.6891647272 mmol/L
6.2063615206 mmol/L
6.7235583139 mmol/L

Millimoles per Liter to Milligrams per Deciliter Conversion Table

Millimoles per Liter (mmol/L) Milligrams per Deciliter (mg/dL)
1 mmol/L 38.67 mg/dL
1.5 mmol/L 58.005 mg/dL
2 mmol/L 77.34 mg/dL
2.6 mmol/L 100.542 mg/dL
3 mmol/L 116.01 mg/dL
3.4 mmol/L 131.478 mg/dL
4 mmol/L 154.68 mg/dL
4.5 mmol/L 174.015 mg/dL
5 mmol/L 193.35 mg/dL
5.2 mmol/L 201.084 mg/dL
6 mmol/L 232.02 mg/dL
6.2 mmol/L 239.754 mg/dL
7 mmol/L 270.69 mg/dL
8 mmol/L 309.36 mg/dL

Milligrams per Deciliter to Millimoles per Liter in Everyday Objects

Common real-world examples that make Milligrams per Deciliter and Millimoles per Liter easy to picture at a glance.

  Milligrams per Deciliter (mg/dL) Millimoles per Liter (mmol/L)
Desirable total on US lab slips 200 mg/dL 5.1719679338 mmol/L
High-risk total threshold 240 mg/dL 6.2063615206 mmol/L
Optimal LDL target in the US 100 mg/dL 2.5859839669 mmol/L
Protective HDL floor for men 40 mg/dL 1.0343935868 mmol/L
Typical US adult total reading 190 mg/dL 4.9133695371 mmol/L
Borderline-high LDL level 160 mg/dL 4.137574347 mmol/L

Milligrams per Deciliter Reference Ranges

  Milligrams per Deciliter (mg/dL) Millimoles per Liter (mmol/L)
Total cholesterol — desirable 80–200 mg/dL 2.0687871735–5.1719679338 mmol/L
Total cholesterol — high 200–240 mg/dL 5.1719679338–6.2063615206 mmol/L
LDL cholesterol — optimal 50–100 mg/dL 1.2929919834–2.5859839669 mmol/L
HDL cholesterol — protective 40–100 mg/dL 1.0343935868–2.5859839669 mmol/L

Medical disclaimer: the reference ranges on this page are general educational values for healthy adults and may vary by laboratory method, age, sex, and health status. They are not a diagnosis and do not replace professional medical advice. Always ask a qualified healthcare provider to interpret your test results.

When You Need Milligrams per Deciliter to Millimoles per Liter Conversions

Preparing a US Report for Your Australian GP

Back from a trip to the States with blood results in hand? Translate them before your next appointment in Sydney, Melbourne, or Perth: a total of 190 mg/dL becomes 4.913 mmol/L and an HDL of 60 mg/dL becomes 1.552 mmol/L, so your file matches the ranges on a standard Australian pathology report.

Checking Yourself Against Heart Foundation Targets

Australian advice targets a total cholesterol of 5.5 mmol/L or less, with many GPs pushing for under 5.0. A US-sourced result of 183 mg/dL converts to 4.73 mmol/L — comfortably inside — while 200 mg/dL (5.172 mmol/L) sits between the two goals.

Checking Clinical Trial Eligibility

International cardiology trials — including studies run through Australian hospitals — set LDL entry thresholds such as 4.9 mmol/L or 3.4 mmol/L. Converting a US LDL of 190 mg/dL (4.913 mmol/L) or 130 mg/dL (3.362 mmol/L) shows immediately where you stand against the criteria.

Re-Baselining After Moving to Australia

If your US baseline total was 220 mg/dL (5.689 mmol/L) and your new Melbourne pathology lab reports the follow-up as 5.2 mmol/L (201.08 mg/dL), you can see you have moved from above the line to inside the desirable band.

Related Cholesterol Conversions

Cholesterol mmol/L to mg/dL Converter for Australian Pathology Reports
Millimoles per Liter → Milligrams per Deciliter

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How to Use

  1. 1

    Enter Your mg/dL Value

    Type the number from the US report or article you are reading — for instance, 130 for an LDL of 130 mg/dL

  2. 2

    See the mmol/L Result

    It converts instantly: 130 mg/dL = 3.362 mmol/L, the unit used on every Australian pathology report

  3. 3

    Copy or Reverse

    Copy the mmol/L value, or click Swap to convert a figure from your GP's report back into mg/dL for an American form or study

  4. 4

    Check the Table

    Confirm neighbouring anchors like 100 mg/dL = 2.586 mmol/L or 190 mg/dL = 4.913 mmol/L

Why Use Be Converter?

Convert a Whole US Panel in Seconds

Enter 200 and immediately see 5.172 mmol/L — translate the total, LDL, and HDL lines from an American pathology report one after another

Exact Two-Way Factor

Divides by 38.67 precisely, so 240 mg/dL lands on 6.206 mmol/L — right on the 6.2 high-risk cut-off quoted in Australian heart-health guidance

Lipid Anchor Table

Values from 40 to 260 mg/dL mapped to mmol/L, spanning the protective HDL floor (40 = 1.034) through to totals well past the Australian high mark of 6.2 (240 = 6.206)

Swap Into US Units Anytime

One click flips the direction — handy when an American study or health site quotes mg/dL and you want your familiar mmol/L figure, or the other way round

Free & Unlimited

No account, no limits. Convert every cholesterol value on your pathology report — and the whole family's — at no cost

Private by Design

The maths runs entirely in your browser. Sensitive lipid results are never sent to any server

Frequently Asked Questions

How many mmol/L is 1 mg/dL of cholesterol?
One mg/dL equals 0.02586 mmol/L. Because such a small multiplier is awkward to use mentally, convert by dividing mg/dL by 38.67 instead — it is the same factor viewed from the other direction.
How do I convert my cholesterol from mg/dL to mmol/L?
Divide the mg/dL value by 38.67. A total cholesterol of 220 mg/dL is 220 ÷ 38.67 = 5.689 mmol/L. A quick estimate: divide by 40, then add about 3.5 per cent.
What is 200 mg/dL in mmol/L?
200 mg/dL equals 5.172 mmol/L. It is the classic boundary number: US labs call 200 the top of the desirable range, while Australian guidance aims for a total of 5.5 mmol/L or less — so a reading of 200 mg/dL sits comfortably under the local target.
Which countries use mg/dL for cholesterol?
The United States reports cholesterol in mg/dL, and a few other countries historically did too. Australia, New Zealand, the UK, Canada, and most of Europe report in mmol/L instead — Australian pathology labs switched decades ago. Dividing any US value by 38.67 makes the two systems directly comparable.
Does the 38.67 factor work for triglycerides too?
No. Triglycerides have a different molar mass and convert at roughly 88.57 mg/dL per mmol/L. Only total cholesterol, LDL, and HDL — the same molecule in different lipoprotein packages — share the 38.67 divisor.
Is 200 mg/dL cholesterol high?
In US terms, 200 mg/dL (5.172 mmol/L) is exactly the dividing line between desirable and borderline, with 240 mg/dL (6.206 mmol/L) classed as high. In Australian terms, 5.172 mmol/L sits under the commonly quoted 5.5 mmol/L ceiling but above the stricter 5.0 goal many GPs prefer for people with other risk factors. Your GP will weigh LDL, HDL, blood pressure, and family history before drawing conclusions.
Why do Australian labs report cholesterol in mmol/L?
Australian pathology laboratories adopted SI units in the 1970s and 1980s, reporting cholesterol as a particle concentration rather than a weight. The same blood that reads 150 mg/dL in a US lab prints as 3.879 mmol/L in Sydney, Melbourne, or Hobart — divide any American result by 38.67 to line it up with your usual report.
What is 100 mg/dL in mmol/L?
100 mg/dL equals 2.586 mmol/L. That is the US optimal LDL target; Australian guidance phrases the goal as keeping LDL below 2.0 mmol/L (about 77 mg/dL), with around 2.6 mmol/L often used for people at lower cardiovascular risk.

About Our mg/dL to mmol/L Cholesterol Converter

Our free online mg/dL to mmol/L cholesterol converter translates American lipid results into the SI units used on every Australian pathology report. Whether you are reading a US heart-health article that quotes mg/dL, comparing old results from a stint working in the States with new numbers from your GP, checking an American relative's test against Australian targets, or working through a clinical study reported in mg/dL, this tool gives instant, precise answers. Every cholesterol fraction — total, LDL, and HDL — divides by the same factor of 38.67, so one converter handles the whole panel.

Expert Tips for mg/dL to mmol/L Conversion

1

mg/dL ÷ 38.67 = mmol/L exactly. Multiplying by 0.02586 gives the same result, because 0.02586 is simply 1 ÷ 38.67 rounded.

2

Four anchors cover most conversations: 200 mg/dL = 5.172 mmol/L (the US desirable ceiling), 240 = 6.206 (high by Australian standards too), 100 = 2.586 (optimal LDL in the US), and 40 = 1.034 (the protective HDL floor).

3

A fast mental route is divide by 40, then add 3.5 per cent: 220 mg/dL becomes 5.5, then about 5.69 mmol/L — within 0.01 of the exact 5.689.

4

Keep the factor strictly for cholesterol. Triglycerides on the same pathology report convert with roughly 88.57 instead of 38.67, so a US-to-SI triglyceride conversion needs its own divisor.

5

When comparing HDL with Australian reference ranges, remember the protective floor is commonly quoted as 40 mg/dL (1.034 mmol/L) for men and 50 mg/dL (1.293 mmol/L) for women — Australian labs generally want HDL above 1.0 mmol/L.

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