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
Common questions
This ratio is calculated by dividing total cholesterol by HDL. It captures the balance between total cholesterol burden and protective HDL in one number.
It's one of the markers used to build a fuller picture of your health. On its own it tells you very little, so it's most informative when reviewed alongside related markers.
It's measured from a standard blood draw at Quest or LabCorp. Cholesterol : HDL Ratio is one of the markers included in the OPTML Apex Panel, where your results are read across systems and reviewed by a U.S.-licensed physician.
Reference ranges vary by laboratory, and a single value rarely tells the whole story. Review your result with a physician in the context of your other markers, symptoms, and history.
Cholesterol : HDL Ratio is one signal among many. Answer a few quick questions and we’ll point you to the panel that fits.
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.
Find the right 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.
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