🩸 Cholesterol Risk: Calculator

Check your Total Cholesterol/HDL ratio and classify your lipid levels using standard clinical ranges.

TOTAL CHOLESTEROL / HDL RATIO
3.8
Good
Total Cholesterol
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LDL Level
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HDL Level
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Triglycerides
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Understanding Your Cholesterol Numbers

Cholesterol is carried through your bloodstream by lipoproteins. LDL ("bad" cholesterol) can build up in artery walls, while HDL ("good" cholesterol) helps remove excess cholesterol from the bloodstream. This calculator applies the standard ATP III classification ranges to your numbers and computes your Total Cholesterol-to-HDL ratio, a simple screening figure clinicians sometimes reference alongside individual lipid levels.

TC/HDL Ratio = Total Cholesterol ÷ HDL Cholesterol

Standard Classification Ranges (mg/dL)

Total CholesterolLDLHDLTriglycerides
<200 Desirable<100 Optimal<40 Low (risk)<150 Normal
200-239 Borderline100-129 Near Optimal≥60 High (protective)150-199 Borderline
≥240 High130-159 Borderline High—200-499 High
—160-189 High / ≥190 Very High—≥500 Very High

⚠️ Important: This tool provides general, educational classification only — it is not the Framingham Risk Score, ASCVD risk calculator, or a medical diagnosis. Cardiovascular risk depends on many additional factors (blood pressure, diabetes, smoking, family history, age). Always discuss your lipid panel with a doctor.

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❓ Frequently Asked Questions

What is a good total cholesterol to HDL ratio?
Generally, a ratio below 3.5 is considered optimal and below 5 is considered acceptable by many clinicians, though guidance varies — lower ratios generally indicate a more favorable balance between 'bad' and 'good' cholesterol.
Is this the same as the Framingham Risk Score?
No. This calculator only classifies your individual lipid values and their ratio. A full cardiovascular risk score also factors in age, blood pressure, smoking status, diabetes, and more.
Can I improve my cholesterol numbers naturally?
Yes — regular aerobic exercise, reducing saturated and trans fats, increasing soluble fiber, maintaining a healthy weight, and not smoking can meaningfully improve LDL, HDL, and triglyceride levels for many people.
Should I use mg/dL or mmol/L?
Use whichever unit matches your lab report — the US typically reports mg/dL, while many other countries use mmol/L. This calculator converts automatically based on your selection.
Why is HDL called 'good' cholesterol?
HDL particles help transport excess cholesterol away from artery walls back to the liver for disposal, which is why higher HDL levels are generally considered protective against heart disease.

🏆 About This Tool — Accuracy & Trust

🔒 Data Privacy: All calculations run entirely within your browser using JavaScript. Nothing you enter here is ever transmitted to our servers, stored, sold, or shared.

📐 Accuracy Note: This tool uses standard, widely published formulas and guidelines. Results are estimates for informational purposes; for financial, medical, or engineering decisions, consult a licensed professional.

📅 Last Updated: September 2026.