Cholesterol Ratio Calculator
Enter your cholesterol test results to calculate your key ratios and understand your cardiovascular risk. Based on the same values your GP uses to assess heart health.
What the Numbers Mean
Total cholesterol under 5.0 mmol/L is the UK target for most adults. HDL (high-density lipoprotein) is protective — higher is better, with 1.0+ mmol/L for men and 1.2+ mmol/L for women considered healthy. LDL (low-density lipoprotein) drives plaque build-up — under 3.0 mmol/L is optimal, under 2.0 mmol/L for those with existing heart disease or diabetes.
Why Ratios Matter More Than Total
Total cholesterol alone is a poor predictor of cardiovascular risk. Someone with a total of 6.0 mmol/L but HDL of 2.0 mmol/L has a ratio of 3.0 — lower risk than someone with a total of 4.5 mmol/L but HDL of only 0.8 mmol/L (ratio 5.6). The total:HDL ratio below 4.0 is generally considered acceptable; below 3.5 is good. The LDL:HDL ratio should ideally be below 2.5.
Improving Your Cholesterol Profile
To raise HDL: regular aerobic exercise, moderate alcohol reduction, weight loss, and stopping smoking are the most evidence-backed methods. To reduce LDL: reduce saturated fat (butter, red meat, full-fat dairy, tropical oils), increase soluble fibre (oats, pulses, apples), and consider plant sterols (2g/day). Statins are the most effective medication and are widely prescribed in the UK for those with a 10-year CVD risk over 10%.
When to See Your GP
A single cholesterol test is a snapshot — levels vary by diet, stress, and recent activity. If your total:HDL ratio is above 6.0, or your total cholesterol is above 7.5 mmol/L, discuss with your GP regardless of other risk factors. For anyone with diabetes, existing heart disease, or a family history of early cardiovascular events, discuss targets with your healthcare provider as lower thresholds apply.
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