Enter the numbers from your blood test to get your cholesterol ratio and see how each result compares with healthy levels.
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Healthy cholesterol levels for adults (UK)
| Result | Healthy level (mmol/L) |
|---|---|
| Total cholesterol | Below 5 |
| HDL (good) | Above 1.0 for men, above 1.2 for women |
| Non-HDL (bad) | Below 4 |
| LDL | Below 3 |
| Triglycerides | Below 1.7 fasting, below 2.3 not fasting |
| Total to HDL ratio | The lower the better; above 6 is high risk |
Non-HDL cholesterol is your total cholesterol minus HDL. It includes all the “bad” types.
Why the ratio matters
Two people can have the same total cholesterol but very different risk. High HDL helps clear cholesterol away, so a lower ratio is better. Your GP looks at it alongside your age, blood pressure, smoking and diabetes to estimate your risk of heart disease and stroke.
If you’ve had a heart attack or stroke, or have diabetes, your targets are lower: follow your doctor’s advice.
Frequently asked questions
How do I work out my cholesterol ratio?
Divide your total cholesterol by your HDL. For example, 5.4 ÷ 1.3 = 4.2.
What is a good cholesterol ratio?
The lower the better. HEART UK says a ratio above 6 is high risk.
Can I use US units?
Yes, switch to mg/dL and the tool converts your numbers.
Is this medical advice?
No. Discuss your results with your GP or nurse.
Sources
- NHS: Cholesterol levels
- HEART UK: Understanding your cholesterol test results
- British Heart Foundation: Understanding your cholesterol levels
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