What the ratio tells you
The total-to-HDL cholesterol ratio divides your total cholesterol by your HDL ("good") cholesterol. Because HDL helps remove cholesterol from the arteries, a higher share of HDL pulls the ratio down, and a lower ratio is associated with lower cardiovascular risk.
The pie chart splits your total cholesterol into the protective HDL portion and the non-HDL portion. Non-HDL cholesterol, which is total minus HDL, bundles together the LDL and other particles that can build up in artery walls.
Reading the categories
The ratio is a quick screen rather than a diagnosis, and the bands here are a general guide.
- Under 3.5 is often considered ideal.
- Between 3.5 and 5 is generally regarded as acceptable.
- Above 5 suggests elevated risk worth discussing with a clinician.
- Non-HDL cholesterol is increasingly used alongside the ratio as a risk marker.
Improving your numbers
Lifestyle changes can shift both halves of the ratio: raising HDL and lowering non-HDL.
- Regular aerobic exercise tends to raise HDL.
- Replacing saturated and trans fats with unsaturated fats lowers LDL.
- Soluble fibre, weight loss and not smoking all help.
- Some people also need medication; that is a decision for your doctor.
A note on health
This calculator is for education only and is not medical advice or a diagnosis. A full lipid panel, your overall risk factors and your clinician’s judgement matter far more than a single ratio. Always discuss your results with a healthcare professional.
Formula
ratio = total cholesterol / HDL; non-HDL = total − HDLFrequently asked questions
- Is a lower cholesterol ratio better?
- Yes. A lower total-to-HDL ratio means a larger share of your cholesterol is the protective HDL type, which is associated with lower cardiovascular risk.