Cholesterol Ratio Calculator

What Are Cholesterol Ratios?

Cholesterol ratios combine lipid panel results into single numbers that may reflect cardiovascular risk when values are already within desirable ranges. Common ratios include LDL/HDL, triglyceride/HDL, and total cholesterol/HDL. Use alongside the Heart Disease Risk Calculator for broader risk context.

The Friedewald Relationship

When LDL is not reported, it can be estimated as total cholesterol minus HDL minus 0.2 times triglycerides (all in mg/dL). This calculator applies that formula when LDL is omitted or needs verification.

Interpreting Each Ratio

LDL/HDL below 2.0 is often considered ideal. Triglyceride/HDL thresholds differ in mg/dL versus mmol/L units. Total cholesterol/HDL below 3.5 is ideal; above 5.0 is generally unfavorable. Ratios should not override abnormal individual lipid levels.

Frequently Asked Questions

Which inputs are required?

Enter total cholesterol, HDL, and triglycerides in mg/dL. LDL is optional and will be derived when omitted.

What is a good LDL/HDL ratio?

Below 2.0 is ideal. Between 2.0 and 5.0 is often acceptable. Above 5.0 is considered too high for risk interpretation.

Why show triglyceride/HDL in mmol/L?

Some guidelines reference mmol/L-based TG/HDL thresholds. Toggle the option to view that scale with appropriate cutoffs.

Can I use ratios if my lipids are abnormal?

Ratios are supplementary. If total cholesterol, LDL, or triglycerides exceed clinical targets, treat the primary abnormality first with your clinician.

What does the TC consistency warning mean?

It appears when entered total cholesterol differs from HDL plus LDL plus 0.2 times triglycerides by more than 5 mg/dL, suggesting lab rounding or a non-Friedewald LDL measurement.

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What Are Cholesterol Ratios?

The Friedewald Relationship

Interpreting Each Ratio

Frequently Asked Questions

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