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Calculator: Friedewald Equation for Low Density Lipoprotein (LDL-C) (conventional units)*

Calculator: Friedewald Equation for Low Density Lipoprotein (LDL-C) (conventional units)*

Total cholesterol  

Important: Inputs must be complete to perform calculation.

Decimal precision  


  • This calculation is not valid when the Triglyceride level is ≥400 mg/dL.
  • HDL-C: high-density lipoprotein cholesterol; LDL-C: low-density lipoprotein cholesterol.
  • * This calculator uses conventional units (also known as US units and gravimetric units) as the default for inputs. Do not use this calculator if you are using SI units (Système international d'unités); please refer instead to the SI units version of this calculator.

Equations used
LDL-C = Total cholesterol - (Triglyceride / 5) - HDL-C


Only digits 0 to 9 and a single decimal point (".") are acceptable as numeric inputs. Attempted input of other characters into a numeric field may lead to an incorrect result.

Information on this page may not appear correctly if printed.

Legal Notices and Disclaimer

All information contained in and produced by the EBMcalc system is provided for educational purposes only. This information should not be used for the diagnosis or treatment of any health problem or disease. THIS INFORMATION IS NOT INTENDED TO REPLACE CLINICAL JUDGMENT OR GUIDE INDIVIDUAL PATIENT CARE IN ANY MANNER. Click here for full notice and disclaimer.

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Topic 13461 Version 8.0