Friedewald Equation for Low Density Lipoprotein (LDL-C)

 

Input
 

Total Chol		gm/L gm/dL mg% mg/dL mg/mL
HDL		gm/L gm/dL mg% mg/dL mg/mL
Triglyceride		gm/L gm/dL mg% mg/dL mg/mL

 

Result
 

LDL		gm/L gm/dL mg% mg/dL mg/mL
Decimal Precision   0 1 2 3

 

Notes

• In the formula above LDL represents LDL-C and HDL represents HDL-C.
• This calculation is not valid when the Triglyceride level is ≥400 mg/dL.

 
Equations used
 

LDL = TotalChol - (Triglyceride / 5) - HDL

 

 

References

1. Friedewald WT, Levy RI, Fredrickson DS. Estimation of the concentration of low-density lipoprotein cholesterol in plasma, without use of the preparative ultracentrifuge. Clin Chem. 1972, 18;499-502. PubMed ID: 4337382