Friedewald Equation Calculator

Friedewald Equation Calculator calculator can be used to estimate plasma LDL cholesterol levels based on total cholesterol, HDL cholesterol, and triglycerides.

Input Parameters

Calculation Results

Calculation Formula

LDL = Total Cholesterol - HDL - (0.45 × Triglycerides / 5)

Where:
LDL = Low-Density Lipoprotein cholesterol
Total Cholesterol = Total cholesterol level in blood
HDL = High-Density Lipoprotein cholesterol
Triglycerides = Triglyceride level in blood

Calculation Result

Friedewald Equation Calculator Calculator Usage Guide

Learn how to use the Friedewald Equation Calculator and its working principles

How to Use This Calculator

  1. Enter your total cholesterol level in mg/dL
  2. Enter your HDL cholesterol level in mg/dL
  3. Enter your triglyceride level in mg/dL
  4. Click the "Calculate" button to estimate your LDL cholesterol
  5. Review the result and remember that this is an estimation

Understanding the Friedewald Equation

The Friedewald equation is a formula used to estimate LDL cholesterol levels when direct measurement is not available. It's based on the assumption that the amount of triglycerides in the blood is primarily carried by VLDL particles, which can be converted to an equivalent amount of LDL.

The formula is: LDL = Total Cholesterol - HDL - (0.45 × Triglycerides / 5)

Important Notes:

  • This calculator provides an estimation and should not replace professional medical advice
  • The accuracy of the estimation may be affected by very high or very low triglyceride levels
  • For precise LDL measurements, a direct lab test is recommended
  • The Friedewald equation is less accurate for individuals with very high triglyceride levels (above 400 mg/dL)