Cholesterol ratios provide a more complete picture of cardiovascular risk than individual values alone. By comparing total cholesterol, HDL, LDL, and triglycerides, ratios help identify risk even when individual numbers look borderline.
Enter Your Lipid Panel Values
How to Use the Cholesterol Ratio Calculator
This cholesterol ratio calculator takes the four key values from your standard lipid panel — total cholesterol, HDL, LDL, and triglycerides — and computes the three most clinically meaningful ratios for cardiovascular risk assessment.
Step 1: Find Your Lab Values
Your lipid panel results come from a blood test, typically ordered by your doctor. The report will show total cholesterol, HDL, LDL, and triglycerides. US labs report in mg/dL; international labs in mmol/L. Select the correct unit before entering values.
Step 2: Enter All Four Values
Enter total cholesterol, HDL, LDL, and triglycerides in the corresponding fields. All four are needed for complete ratio analysis. The calculator will show all three ratios once you click Calculate.
Step 3: Interpret Your Ratios
Each ratio is color-coded: green for optimal, yellow for borderline, red for elevated risk. The TC/HDL ratio is often considered the strongest single predictor of cardiovascular risk. A ratio below 3.5 is optimal; above 5.0 indicates elevated risk.
Why Ratios Matter More Than Individual Values
A total cholesterol of 220 mg/dL paired with an HDL of 70 mg/dL (ratio: 3.1) is actually favorable. The same total cholesterol with HDL of 35 mg/dL (ratio: 6.3) indicates high risk. Ratios capture the balance between protective and harmful cholesterol fractions, which individual numbers can't show alone.
FAQ
Is this cholesterol calculator free?
Yes, completely free with no signup required. All calculations run locally in your browser.
Is my health data safe?
Yes, all calculations run in your browser. No data is sent to any server.
What is a good TC/HDL ratio?
The total cholesterol to HDL ratio (TC/HDL) should ideally be below 4.0. A ratio under 3.5 is considered optimal. Values above 5.0 suggest increased cardiovascular risk. This ratio is often used because it captures both the harmful LDL component and the protective HDL in a single number.
What is a healthy LDL/HDL ratio?
An LDL/HDL ratio below 2.5 is optimal for most adults. A ratio of 2.5–3.5 is acceptable, and above 3.5 suggests elevated risk. Lower is better — either by lowering LDL (bad cholesterol) or raising HDL (good cholesterol).
What does the triglycerides/HDL ratio mean?
The triglycerides-to-HDL ratio is a marker of insulin resistance and metabolic syndrome. A ratio below 2.0 is considered ideal. Above 3.5 suggests elevated cardiovascular risk and possible insulin resistance, especially in sedentary individuals with high-carb diets.
Should I use mg/dL or mmol/L?
Use the units from your lab report. US labs report in mg/dL while most international labs use mmol/L. This calculator supports both units — just select the correct one before entering your values.