How to calculate the cholesterol ratio
Use total cholesterol and HDL from the same lipid panel.
1
Enter total cholesterol
Use the laboratory value in mg/dL or mmol/L.
2
Enter HDL
Use the HDL figure from the same blood draw.
3
Read the ratio
The band is a broad reference, not a diagnosis or treatment target.
What does this tool do?
The total-to-HDL ratio compares all cholesterol with the protective HDL fraction, while non-HDL captures the cholesterol carried by atherogenic particles. Both are read alongside the rest of the lipid panel.
The Formula
Ratio = total cholesterol ÷ HDL; non-HDL = total cholesterol − HDLFrequently Asked Questions
What is a good total cholesterol to HDL ratio?
Values below about 3.5 are often considered desirable, while above 5 is generally less favourable. Risk depends on the full lipid panel and other factors.
Can I raise HDL with exercise?
Exercise and smoking cessation can help, but the effect is modest. Lowering LDL and managing blood pressure usually matter more for overall risk.