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CardiacLDL/HDL Ratio

LDL-to-HDL Ratio Calculator

Calculate the LDL-to-HDL cholesterol ratio with unit normalization.

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LDL-to-HDL ratio

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Supplementary lipid ratio; no disease or treatment category is assigned

About

The LDL-to-HDL ratio divides LDL cholesterol by HDL cholesterol after converting both values to the same concentration system.

Formula

LDL/HDL ratio = LDL cholesterol ÷ HDL cholesterol

Interpretation

What the result represents: A unitless comparison of LDL-C with HDL-C.

Input units: LDL-C and HDL-C may independently use mg/dL or mmol/L.

Worked example: LDL 120 mg/dL divided by HDL 40 mg/dL gives 3.00.

Applicable population: People with compatible LDL-C and HDL-C laboratory results.

Interpretation limitations: The ratio cannot replace absolute LDL-C, non-HDL-C, ApoB, triglycerides, or comprehensive risk assessment. It does not diagnose atherosclerosis or determine medication, and no cutoff is universal across guidelines and populations.

References

  1. Lemieux I, et al. TC/HDL versus LDL/HDL ratios as indices of ischemic heart disease risk. Arch Intern Med. 2001.
  2. American Heart Association. 2026 Guideline on the Management of Dyslipidemia.

FAQ

Related Calculators

Non-HDL Cholesterol

Calculate non-HDL cholesterol from total cholesterol and HDL-C.

TC/HDL Ratio

Calculate the total cholesterol-to-HDL ratio with unit normalization.

Calculated LDL-C

Calculate LDL cholesterol with the traditional Friedewald equation.

Disclaimer

Educational and informational reference only. Not intended to replace professional medical advice, diagnosis, treatment, or independent verification.