1. What is LDL Cholesterol?

LDL (Low-Density Lipoprotein) cholesterol, often called "bad cholesterol," can build up in the walls of your arteries, increasing your risk of heart disease and stroke. This calculator uses the Friedewald equation to estimate LDL cholesterol levels from a standard lipid panel.

2. How Does the Calculator Work?

The calculator uses the Friedewald equation:

Where:

• \( LDL \) — Low-Density Lipoprotein (mmol/L)
• \( TC \) — Total Cholesterol (mmol/L)
• \( HDL \) — High-Density Lipoprotein (mmol/L)
• \( TG \) — Triglycerides (mmol/L)

Note: This formula is valid when measurements are in mmol/L (UK units) and when triglycerides are less than 4.5 mmol/L.

3. Importance of LDL Calculation

Details: LDL cholesterol is a major risk factor for cardiovascular disease. Monitoring LDL levels helps assess cardiovascular risk and guide treatment decisions.

4. Using the Calculator

Tips: Enter your lipid panel results in mmol/L. All values must be positive numbers. For accurate results, fasting for 9-12 hours before the blood test is recommended.

5. Frequently Asked Questions (FAQ)

Q1: Why is LDL called "bad cholesterol"?
A: LDL contributes to plaque buildup in arteries (atherosclerosis), which can lead to heart attacks and strokes.

Q2: What are optimal LDL levels?
A: Generally, LDL should be below 3.0 mmol/L for healthy adults, and below 2.0 mmol/L for high-risk individuals.

Q3: When is this calculation not accurate?
A: The formula becomes inaccurate when triglycerides exceed 4.5 mmol/L. In such cases, direct LDL measurement is needed.

Q4: How often should LDL be checked?
A: Healthy adults should check every 4-6 years. Those with risk factors may need more frequent testing.

Q5: Can I use this with mg/dL units?
A: No, this version is for mmol/L (UK units). For mg/dL (US units), the divisor for triglycerides would be 5.