LDL Calculator
Enter the required values below to run the educational estimation.
Role of LDL in Heart Health
Low-Density Lipoprotein (LDL) is often called 'bad' cholesterol because it transports cholesterol particles throughout your body, where they can build up in the walls of your arteries, making them hard and narrow (atherosclerosis).
Estimating LDL via the Friedewald Formula
Historically, measuring LDL directly was costly and complex. The Friedewald equation provides a highly reliable, low-cost estimate by subtracting HDL and VLDL (estimated as Triglycerides divided by 5) from total cholesterol.
Clinical Limitations of LDL Estimates
Because the Friedewald equation relies on a fixed ratio between triglycerides and VLDL cholesterol, it loses accuracy when triglycerides are elevated (especially >400 mg/dL) or following a meal. Direct measurement is preferred in these scenarios.
When to Seek Urgent Medical Attention
- Severe chest tightness, pain, or pressure resembling a heart attack.
- Sudden loss of balance, trouble speaking, or confusion.
- Shortness of breath accompanied by cold sweats or nausea.
Frequently Asked Questions
The Friedewald equation is: LDL = Total Cholesterol - HDL Cholesterol - (Triglycerides / 5). It is a standard method used by clinical laboratories.
The formula is less accurate if triglycerides are above 400 mg/dL, in non-fasting states, or if certain rare dyslipidemias are present.
