Cholesterol Level Converter
Convert cholesterol levels between mg/dL (US) and mmol/L (international).
Includes LDL and HDL reference ranges.
Type in either field — the other updates instantly.
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Cholesterol levels are reported in two different units depending on your country.
mg/dL (milligrams per deciliter) is used in the United States, Canada, and parts of Latin America. mmol/L (millimoles per liter) is used in the UK, Australia, Europe, and most of the rest of the world.
Conversion formula:
- mg/dL = mmol/L × 38.67
- mmol/L = mg/dL ÷ 38.67
The factor 38.67 comes from the molecular weight of cholesterol (386.7 g/mol) divided by 10.
Total Cholesterol reference ranges:
| Category | mg/dL | mmol/L |
|---|---|---|
| Desirable | < 200 | < 5.18 |
| Borderline high | 200–239 | 5.18–6.18 |
| High | ≥ 240 | ≥ 6.22 |
LDL Cholesterol (“bad” cholesterol) reference ranges:
| Category | mg/dL | mmol/L |
|---|---|---|
| Optimal | < 100 | < 2.59 |
| Near optimal | 100–129 | 2.59–3.34 |
| Borderline high | 130–159 | 3.37–4.12 |
| High | 160–189 | 4.14–4.90 |
| Very high | ≥ 190 | ≥ 4.92 |
HDL Cholesterol (“good” cholesterol) reference ranges:
| Category | mg/dL | mmol/L |
|---|---|---|
| Low (risk factor) | < 40 (men) / < 50 (women) | < 1.04 / < 1.30 |
| Acceptable | 40–59 | 1.04–1.53 |
| Protective (high) | ≥ 60 | ≥ 1.55 |
Higher HDL is generally better for heart health. Lower LDL reduces risk of cardiovascular disease. Always discuss your specific results with your doctor — these ranges are general guidelines only.