Calculate total cholesterol to HDL ratio and non-HDL cholesterol, then review those results as adjunct lipid markers alongside the rest of the panel.
The Cholesterol Ratio Calculator computes your total cholesterol to HDL ratio (TC/HDL) and non-HDL cholesterol, two useful ways to summarize a standard lipid panel. While the individual lipid values still matter most, these derived numbers can add context when you compare panels over time or review the balance between atherogenic and protective lipoproteins.
TC/HDL is best treated as an adjunct marker rather than a stand-alone risk engine. Non-HDL cholesterol is more directly aligned with modern lipid guidance because it captures all apoB-containing cholesterol other than HDL.
Enter your lipid panel numbers to see the ratio, non-HDL cholesterol, and broad descriptive bands used on this page. The output is meant to support panel interpretation, not to replace guideline-based cardiovascular risk assessment.
Individual cholesterol numbers do not tell the full story. Someone with a total cholesterol of 220 and an HDL of 80 has a very different lipid pattern from someone with total cholesterol of 200 and HDL of 35. TC/HDL and non-HDL cholesterol help summarize that context, but they still need to be interpreted with the rest of the lipid panel and the broader ASCVD risk picture.
TC/HDL Ratio = Total Cholesterol ÷ HDL Cholesterol Non-HDL Cholesterol = Total Cholesterol − HDL Cholesterol Descriptive TC/HDL Bands Used on This Page: • Lower ratio: < 3.5:1 • Favorable: 3.5–4.5:1 • Borderline high: 4.5–5.0:1 • High ratio pattern: > 5.0:1 Non-HDL Cholesterol Bands on This Page: • Optimal: < 130 mg/dL • Near Optimal: 130–159 mg/dL • Borderline High: 160–189 mg/dL • High: 190–219 mg/dL • Very High: ≥ 220 mg/dL These are broad interpretation bands for panel review, not a substitute for guideline-based treatment decisions.
Result: TC/HDL Ratio = 3.8:1 (Desirable), Non-HDL = 155 mg/dL
TC/HDL = 210 ÷ 55 = 3.82. This falls in the desirable range of 3.5–4.5. Non-HDL = 210 − 55 = 155 mg/dL, which is near optimal. This profile suggests moderate cardiovascular risk, but could be improved by raising HDL through exercise or lowering total cholesterol.
Cholesterol ratios distill the lipid panel into a compact summary number. TC/HDL can help show whether HDL is relatively strong or weak compared with total cholesterol, and it can be useful for tracking changes over time.
Non-HDL cholesterol is total cholesterol minus HDL, so it captures all of the apoB-containing cholesterol outside the protective HDL fraction. Modern lipid guidance gives more direct weight to non-HDL cholesterol, ApoB, triglycerides, and the overall ASCVD risk picture than to any single ratio.
Use TC/HDL and non-HDL as adjunct markers when reviewing the full lipid panel. They are most helpful when they add context to absolute LDL-C, triglycerides, and the overall prevention plan rather than trying to replace them.
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This page calculates the total-cholesterol-to-HDL ratio by dividing total cholesterol by HDL cholesterol, then calculates non-HDL cholesterol as total cholesterol minus HDL. If LDL is entered, the page also shows the LDL/HDL ratio as an optional context number.
The output is a lipid-panel interpretation aid, not a stand-alone cardiovascular risk engine. Current dyslipidemia guidance gives more direct weight to overall ASCVD risk plus LDL-C, non-HDL-C, triglycerides, ApoB, and lipoprotein(a) than to any single cholesterol ratio. The ratio bands shown on the page are descriptive context for panel review rather than formal treatment targets.
On this page, ratios below 3.5:1 are treated as more favorable and values above 5:1 as less favorable. The ratio is still only one adjunct marker and should not replace LDL-C, non-HDL-C, ApoB, triglycerides, or overall ASCVD risk assessment.
Non-HDL cholesterol is calculated as total cholesterol minus HDL. It captures all "bad" cholesterol types — LDL, VLDL, IDL, and lipoprotein(a). Many cardiologists now prefer non-HDL over LDL alone as a risk marker because it is more comprehensive.
TC/HDL can add context, especially when it differs from LDL-C or non-HDL-C patterns, but current lipid management relies more directly on overall ASCVD risk plus markers such as LDL-C, non-HDL-C, ApoB, triglycerides, and lipoprotein(a). No single number tells the whole story.
Focus on both lowering total cholesterol (less saturated fat, more fiber, weight loss) and raising HDL (aerobic exercise, healthy fats, moderate alcohol, quitting smoking). Even modest improvements to HDL have a disproportionate effect on the ratio.
The 2018 AHA/ACC guidelines relaxed the fasting requirement for standard lipid panels. Non-fasting total cholesterol and HDL are reliable. However, fasting may still be needed for accurate triglyceride and calculated LDL values.
Adults aged 20+ should get a lipid panel every 4–6 years. Those with risk factors (family history, diabetes, obesity, smoking) should test more frequently — every 1–2 years. If you're on statins, your doctor will check every 3–12 months.