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mmol/L to mg/dL Converter

Turn a glucose, cholesterol or triglyceride result in mmol/L into mg/dL, the unit used in the US. You also get the standard adult reference ranges in both units so you can compare results from different countries. Informational only.

Last updated: October 24, 2026

Lab test (analyte)

Glucose, cholesterol and triglycerides each use their own factor

Value in mmol/L

mmol/L

Enter your values to see the result.

How to use the mmol/L to mg/dL Converter

Choose the lab test from the list (glucose, total, LDL, HDL or non-HDL cholesterol, triglycerides).
Enter the value in mmol/L as printed on your report. The mg/dL result appears as you type.
Compare it with the reference ranges table, which shows each category in both units.
Copy or download the result and tables if you want to keep them with your records.

Reference ranges in mmol/L and mg/dL

The adult cut-offs most labs and guidelines use, in both units. Guidelines set them in mg/dL; the mmol/L values are the conventional rounded equivalents.

Test	Category	mmol/L	mg/dL
Fasting glucose (ADA)	Normal	3.9–5.5	70–99
	Prediabetes range	5.6–6.9	100–125
	Diabetes range*	7.0 or higher	126 or higher
2-hour glucose, 75 g OGTT (ADA)	Normal	below 7.8	below 140
	Prediabetes range	7.8–11.0	140–199
	Diabetes range*	11.1 or higher	200 or higher
Total cholesterol (NCEP ATP III)	Desirable	below 5.2	below 200
	Borderline high	5.2–6.1	200–239
	High	6.2 or higher	240 or higher
LDL cholesterol (NCEP ATP III)	Optimal	below 2.6	below 100
	Near or above optimal	2.6–3.3	100–129
	Borderline high	3.4–4.0	130–159
	High	4.1–4.8	160–189
	Very high	4.9 or higher	190 or higher
HDL cholesterol (NCEP ATP III)	Low	below 1.0	below 40
	Normal	1.0–1.5	40–59
	High (protective)	1.6 or higher	60 or higher
Triglycerides (NCEP ATP III)	Normal	below 1.7	below 150
	Borderline high	1.7–2.2	150–199
	High	2.3–5.5	200–499
	Very high	5.6 or higher	500 or higher

*A diagnosis requires confirmation by repeat testing and a clinician. Many labs flag HDL below 1.3 mmol/L (50 mg/dL) as low for women. Children, pregnancy and people with existing conditions use different targets.

The mmol/L to mg/dL formula

mg/dL = mmol/L × molar mass ÷ 10

Glucose: 180.16 ÷ 10 = 18.016. Example: 6.1 mmol/L × 18.016 = 110 mg/dL.
Cholesterol: 386.65 ÷ 10 ≈ 38.67. Example: 3.0 mmol/L LDL × 38.67 = 116 mg/dL.
Triglycerides: 885.7 ÷ 10 = 88.57. Example: 2.0 mmol/L × 88.57 = 177 mg/dL.

The division by 10 is there because a deciliter (dL) is one tenth of a liter.

Blood glucose mmol/L to mg/dL chart

mmol/L	mg/dL	mmol/L	mg/dL
3.0	54	9.0	162
3.9	70	10.0	180
4.5	81	11.1	200
5.0	90	13.0	234
5.6	101	15.0	270
6.0	108	18.0	324
7.0	126	20.0	360
7.8	141	25.0	450
8.0	144	30.0	540

Frequently asked questions

How do I convert mmol/L to mg/dL for blood sugar?

Multiply by 18.016 (about 18). For example 5.5 mmol/L × 18.016 = 99 mg/dL, and 7.0 mmol/L × 18.016 = 126 mg/dL.

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

Multiply by 38.67. This works for total, LDL, HDL and non-HDL cholesterol. For example 5.2 mmol/L × 38.67 = 201 mg/dL.

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

Multiply by 88.57. For example 1.7 mmol/L × 88.57 = 151 mg/dL, which is where the borderline-high range starts.

What is a normal fasting blood sugar in mmol/L?

Under the ADA cut-offs a fasting plasma glucose of 3.9 to 5.5 mmol/L (70 to 99 mg/dL) is in the normal range, 5.6 to 6.9 mmol/L is the prediabetes range and 7.0 mmol/L or higher is the diabetes range when confirmed. Your lab's own range may differ slightly.

Why are the mmol/L cut-offs round numbers like 5.2 and 6.2?

Guidelines were written in mg/dL (200 and 240 mg/dL for total cholesterol) and then converted and rounded to one decimal for countries that use mmol/L. That is why converted cut-offs can differ by a tiny amount from an exact conversion.

My number is 110. Is that mmol/L?

Probably not. Glucose in mmol/L is usually between about 3 and 30, and cholesterol between about 1 and 10. A value like 110 is almost certainly already in mg/dL; the tool warns you when a number looks too large.

Does this tool give medical advice?

No. It converts units and shows standard adult reference cut-offs for context only. It does not diagnose conditions or suggest treatment or doses; ask your doctor or lab to interpret your results.

Are all the tools on FreeToolCabin tested for quality and accuracy?

Yes! Every tool on our site undergoes automated Q/A testing in real browser environments to ensure high precision, correct output, and zero errors. If you happen to spot a bug or have a suggestion, please contact us at [email protected] and our team will review it right away.

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