Non-HDL Cholesterol Calculator
Non-HDL cholesterol and atherogenic ratios
How it's calculated
Non-HDL cholesterol is the sum of all the "bad" cholesterol fractions and is calculated very simply:
Non-HDL = total cholesterol − HDL cholesterol
The calculator also shows the main ratios: TC/HDL (total/HDL), LDL/HDL and TG/HDL (which need their respective values). The ratios are dimensionless and unit-independent.
How to interpret the result
| Indicator | Rough reference |
|---|---|
| Non-HDL | < 130 mg/dL (lower at high risk: < 100, < 85) |
| TC/HDL | Desirable < 5; ideal < 3.5 |
| TG/HDL | Lower is favourable (insulin-resistance proxy) |
Important: targets are personalised to overall cardiovascular risk. The TG/HDL ratio depends on the unit (mg/dL thresholds do not apply in mmol/L) and on ethnicity. The result is not a diagnosis.
Why it matters
Non-HDL cholesterol captures all atherogenic lipoproteins (LDL, VLDL and others), not just LDL, which is why it is often a better cardiovascular risk predictor than LDL alone — especially when triglycerides are high.
The TG/HDL ratio is also an indirect marker of insulin resistance: see HOMA-IR and the TyG index; for LDL estimation see the LDL cholesterol calculator.
How the test is done
- You need a lipid panel: total and HDL cholesterol (LDL and triglycerides for the ratios).
- For triglycerides a 9–12 hour fast is usually recommended.
- Enter all values in the same unit (mg/dL).
What to do about your result
- Lifestyle: a diet low in saturated fat, physical activity, weight control and not smoking improve the lipid profile.
- Treatment: any treatment and targets are decided by your doctor based on risk.
When to see a professional: consult a doctor if values are high or if you have other cardiovascular risk factors.
Limitations
- The ratios have no universal thresholds and must be read in clinical context.
- TG/HDL is not comparable across different units and varies by ethnicity.
- These are risk indicators, not a diagnosis.
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