1. What is LDL Cholesterol Calculation?

The LDL cholesterol calculation using the formula LDL = TC - HDL - (TG / 2.2) provides an estimate of low-density lipoprotein cholesterol levels in mmol/L. This calculation is commonly used when direct LDL measurement is not available.

2. How Does the Calculator Work?

The calculator uses the following formula:

Where:

• \( TC \) — Total cholesterol (mmol/L)
• \( HDL \) — HDL cholesterol (mmol/L)
• \( TG \) — Triglycerides (mmol/L)

Explanation: This formula estimates LDL cholesterol by subtracting HDL and VLDL (estimated as TG/2.2) from total cholesterol.

3. Importance of LDL Calculation

Details: LDL cholesterol is often called "bad cholesterol" as high levels are associated with increased risk of cardiovascular disease. Monitoring LDL levels helps in assessing cardiovascular risk and guiding treatment decisions.

4. Using the Calculator

Tips: Enter total cholesterol, HDL cholesterol, and triglycerides in mmol/L. All values must be valid positive numbers. The calculator will provide the estimated LDL cholesterol level.

5. Frequently Asked Questions (FAQ)

Q1: Why use this formula instead of direct measurement?
A: This calculation method is cost-effective and widely used when direct LDL measurement is not available, though direct measurement is more accurate.

Q2: What are optimal LDL cholesterol levels?
A: Optimal LDL levels are generally below 2.6 mmol/L, though target levels may vary based on individual cardiovascular risk factors.

Q3: When is this calculation less accurate?
A: The formula becomes less accurate when triglyceride levels are very high (above 4.5 mmol/L) or in certain medical conditions.

Q4: Should this calculation be used for everyone?
A: While useful for general screening, individuals with very high triglycerides or specific medical conditions may require direct LDL measurement for accurate assessment.

Q5: How often should cholesterol levels be checked?
A: Adults should have cholesterol checked every 4-6 years, or more frequently if risk factors are present or treatment is ongoing.