Cholesterol Ratio Calculator
Find your total-to-HDL cholesterol ratio.
Results update as you type.
This calculator provides estimates based on population research. Results are not medical advice. Consult a qualified healthcare provider before making health or nutrition decisions.
How it works
Your cholesterol ratio puts your numbers in context better than total cholesterol alone, and this calculator computes it. You enter your total cholesterol and your HDL, and it returns your total-to-HDL ratio and your non-HDL cholesterol. The ratio matters because HDL, or high-density lipoprotein, carries cholesterol away from the arteries and is protective, so a higher HDL improves your ratio. Total cholesterol alone can be misleading: two people with the same total can have very different risk depending on how much is HDL. A lower ratio indicates a healthier balance; a commonly cited goal is a ratio below about 5, with below 3.5 considered optimal, though targets vary by guideline and individual risk. Non-HDL cholesterol, calculated as total minus HDL, sums all the harmful cholesterol-carrying particles, including LDL and others, and is increasingly used as a risk marker because it captures more than LDL alone. Both figures help you and your doctor assess cardiovascular risk and track the effect of diet, exercise, and any medication. This calculator is an educational tool, not a diagnosis; interpret your numbers with a healthcare provider who can consider your full risk profile. Enter your total and HDL cholesterol to find your ratio and non-HDL cholesterol.
Ratio = total cholesterol / HDL ; non-HDL = total − HDL
The cholesterol ratio divides total cholesterol by HDL, the 'good' cholesterol. A lower ratio is better because it means a larger share of your cholesterol is the protective kind. Non-HDL cholesterol is total minus HDL, capturing all the atherogenic particles that contribute to plaque, and is another useful risk marker.
Source:American Heart Association cholesterol guidance
We review all our tools from time to time to ensure accuracy.
Worked example
How to use this calculator
- 1
Enter your values
Enter total cholesterol and hdl cholesterol.
- 2
Adjust the options
Fine-tune any options to match your situation.
- 3
Read your result
Total-to-HDL ratio updates instantly as you type — no button to press.
Frequently asked questions
What is a good cholesterol ratio?
A lower total-to-HDL ratio is better. A ratio below about 5 is commonly considered acceptable, and below 3.5 is often described as optimal, though specific targets vary by guideline and personal risk. Because the ratio accounts for protective HDL, it can reveal risk that total cholesterol alone hides. Discuss your target with your doctor.
Why is the ratio more useful than total cholesterol?
Total cholesterol lumps together protective HDL and harmful particles, so two people with the same total can have very different risk. The ratio compares total to HDL, rewarding a higher level of protective cholesterol. This gives a more meaningful picture of cardiovascular risk than a single total number viewed in isolation.
What is non-HDL cholesterol?
Non-HDL cholesterol is your total cholesterol minus HDL, which sums all the cholesterol carried by potentially harmful particles, including LDL and others linked to plaque buildup. It is increasingly used as a risk marker because it captures more atherogenic cholesterol than LDL alone and does not require fasting to measure accurately.
How can I improve my cholesterol ratio?
Raising HDL and lowering harmful cholesterol both help. Regular exercise, not smoking, and healthy fats from fish, nuts, and olive oil tend to raise HDL, while reducing saturated and trans fats, losing excess weight, and eating more fiber lower harmful cholesterol. For some people, medication prescribed by a doctor is also needed to reach a healthy ratio.
Is this calculator a substitute for medical advice?
No. This tool is for education and helps you understand your numbers, but it does not diagnose or treat any condition. Cholesterol should be interpreted alongside your blood pressure, blood sugar, family history, and other factors by a healthcare professional, who can recommend the right targets and any treatment based on your overall cardiovascular risk.