Your cholesterol ratio further helps your doctor to determine a degree of heart disease risk.
Calculate your cholesterol ratio by dividing your high-density lipoprotein (HDL) into your total cholesterol.
For example, if your total cholesterol is 200 milligrams per deciliter (mg/dL) and your HDL is 50 mg/dL, your cholesterol ratio is 4-to-1. The American Heart Association says you should keep your cholesterol ratio 5-to-1 or lower. A good ratio is 3.5-to-1. A higher ratio indicates a higher risk of heart disease; a lower ratio indicates a lower risk.
Studies have found that there is more bad cholesterol than just LDL that includes smaller particles and triglycerides. This fraction is called non-HDL cholesterol. If you subtract the HDL from the total, this is the real good cholesterol called non-HDL Cholesterol. The non-HDL cholesterol should be under 120 for good health.