Cholesterol Ratio Calculator
Understand your lipid profile by converting total and HDL cholesterol into actionable risk ratios. Optionally include LDL and triglycerides for additional insight.
Ratios summarise the balance between atherogenic and protective lipoproteins. Lower values generally indicate lower cardiovascular risk.
How to Use This Calculator
Gather your lipid panel
Use fasting laboratory results for total cholesterol, HDL, LDL, and triglycerides when available.
Select consistent units
Choose mg/dL or mmol/L before entering values. The calculator converts results automatically.
Discuss results with your clinician
Ratios add context but should complement LDL levels, blood pressure, family history, and overall cardiovascular risk.
Formula Reference
Total / HDL = Total Cholesterol ÷ HDL (same units)
Non-HDL = Total Cholesterol − HDL
LDL / HDL = LDL ÷ HDL
Triglyceride / HDL (optional)
- Convert mmol/L to mg/dL by multiplying by 38.67; divide by 38.67 for the reverse.
- Ratios augment, but do not replace, absolute LDL and apoB targets.
- Discuss statin or PCSK9 therapy with your healthcare provider if ratios remain high.
Frequently Asked Questions
What is a healthy total-to-HDL ratio?
Many cardiologists aim for ratios below 3.5. Values exceeding 5 are linked to higher cardiovascular risk and usually prompt closer monitoring.
How can I improve my ratio?
Lifestyle measures such as Mediterranean-style eating patterns, aerobic exercise, smoking cessation, and weight management can raise HDL and lower total cholesterol.
Does this replace LDL goals?
No. Ratios provide context but guideline-based therapy still focuses on LDL, non-HDL, or apoB targets tailored to your risk profile.
Should I calculate ratios if my triglycerides are very high?
Yes, but prioritise lowering triglycerides above 500 mg/dL to reduce pancreatitis risk. High triglycerides can also depress HDL, affecting ratios.