Chol / HDL
The ratio of total cholesterol to HDL — a single-number cardiovascular risk score.
What is it
This ratio is calculated by dividing total cholesterol by HDL. It captures the balance between total cholesterol burden and protective HDL in one number.
Why it's measured
The total cholesterol-to-HDL ratio has been used as a cardiovascular risk indicator in clinical practice and epidemiologic research.
Reference range
Standard laboratory reference
< 4.5 ratio
Reference ranges vary by laboratory. Your individual reference range will appear on your test report and should be interpreted by your physician in the context of your overall health profile.
What results may indicate
Elevated
Has been associated with elevated cardiovascular risk in published research.
Lower
Is generally considered favorable.
These associations are general. They are not a personal diagnosis or prediction. Discuss your individual results with your physician in the context of your full health profile.
When it's measured
Calculated and reported automatically on most cholesterol panels.
Related markers
Measured in
A complete look at your heart, hormones, metabolism, inflammation, and longevity systems — drawn at Quest or LabCorp, reviewed by a U.S.-licensed physician.
Explore the Apex Panel →This information is for general educational purposes only and is not medical advice. Lab results alone are not intended to diagnose, treat, or cure any condition and do not replace the advice of a healthcare provider. OPTML does not offer medical advice, a diagnosis, medical treatment, or any form of medical opinion.