Cholesterol Unit Converter

mg/dL (milligrams per decilitre) is used in the United States to measure cholesterol. mmol/L (millimoles per litre) is used internationally. The conversion factor is 38.67: divide mg/dL by 38.67 to get mmol/L, or multiply mmol/L by 38.67 to get mg/dL. This factor differs from blood glucose (18.0182) because cholesterol and glucose have different molecular weights.

According to the AHA: Total cholesterol under 200 mg/dL (under 5.2 mmol/L) is desirable. LDL cholesterol under 100 mg/dL (under 2.6 mmol/L) is optimal. HDL cholesterol of 60 mg/dL (1.6 mmol/L) or higher is considered protective. Triglycerides under 150 mg/dL (under 1.7 mmol/L) are normal. These are reference ranges for informational purposes only. Consult your healthcare provider for interpretation of your personal results.

LDL (low-density lipoprotein) cholesterol is often called 'bad' cholesterol because high levels can lead to plaque buildup in arteries. HDL (high-density lipoprotein) cholesterol is called 'good' cholesterol because it helps remove LDL from arteries and transport it to the liver. Higher HDL and lower LDL levels are generally better for cardiovascular health.

Triglycerides are a type of fat (lipid) in the bloodstream. They come from carbohydrates, alcohol, and fats in your diet. High triglyceride levels (above 200 mg/dL or 2.26 mmol/L) can increase the risk of heart disease and stroke, especially when combined with high LDL and low HDL cholesterol. The converter translates triglycerides between units using the same factor as other cholesterol measurements.

The American Heart Association recommends cholesterol screening at least once every five years for most adults starting at age 20. People with high cholesterol, heart disease, or family history of heart disease may need more frequent testing. Your healthcare provider can advise on the right screening schedule for your situation.