LDL Cholesterol Calculator

LDL cholesterol — the "bad" cholesterol linked to heart disease — isn't directly measured in standard blood panels, but it can be calculated from other results using the Friedewald equation. Enter your Total Cholesterol, HDL Cholesterol, and Triglycerides (all in mg/dL) into the LDL Cholesterol Calculator to get your estimated LDL level. Secondary outputs include your LDL Category and associated Cardiovascular Risk rating. Also try the Cholesterol Units Converter Calculator.

mg/dL

Total cholesterol level in milligrams per deciliter

mg/dL

High-density lipoprotein (good cholesterol) level

mg/dL

Triglyceride level in milligrams per deciliter

Results

LDL Cholesterol

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LDL Category

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Cardiovascular Risk

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Frequently Asked Questions

How to calculate LDL cholesterol?

LDL cholesterol is calculated using the Friedewald equation: LDL = Total Cholesterol - HDL - (Triglycerides ÷ 5). This formula estimates LDL-C levels when triglycerides are below 400 mg/dL. See also our LDL Calculator.

What's a normal LDL cholesterol level?

Optimal LDL is less than 100 mg/dL. Near optimal is 100-129 mg/dL, borderline high is 130-159 mg/dL, high is 160-189 mg/dL, and very high is 190 mg/dL or above.

How do I calculate LDL with total cholesterol 230, HDL 47, and TG 123?

Using the Friedewald equation: LDL = 230 - 47 - (123 ÷ 5) = 230 - 47 - 24.6 = 158.4 mg/dL. This would be classified as borderline high LDL cholesterol.

Are there any Friedewald equation limitations?

Yes, the Friedewald equation is less accurate when triglycerides exceed 400 mg/dL, in non-fasting samples, or in patients with certain genetic lipid disorders. Direct LDL measurement may be needed in these cases.

How do I get my LDL below 70 mg/dL?

To lower LDL cholesterol, follow a heart-healthy diet low in saturated and trans fats, exercise regularly, maintain healthy weight, and consider medication if prescribed by your doctor. Statins are commonly used for significant LDL reduction.

What is the difference between LDL and HDL cholesterol?

LDL (low-density lipoprotein) is 'bad' cholesterol that can build up in arteries, while HDL (high-density lipoprotein) is 'good' cholesterol that helps remove cholesterol from arteries and transport it to the liver for disposal.

When should I check my cholesterol levels?

Adults should have cholesterol checked every 4-6 years starting at age 20, or more frequently if at high risk. Those with heart disease, diabetes, or family history may need more frequent monitoring as recommended by their healthcare provider.