Cardiology · Internal Medicine

Friedewald Estimated LDL Cholesterol calculator

Enter the published formula inputs below to calculate and interpret this score.

Clinical inputs

Total cholesterol (mg/dL)

HDL cholesterol (mg/dL)

Triglycerides (mg/dL)

Result

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Formula inputs

Total cholesterol (mg/dL)Accepted range: 50 to 600
HDL cholesterol (mg/dL)Accepted range: 10 to 150
Triglycerides (mg/dL)Accepted range: 30 to 1000

Primary source

Friedewald WT et al. Estimation of the concentration of low-density lipoprotein cholesterol in plasma, without use of the preparative ultracentrifuge. Clin Chem. DOI: 10.1093/clinchem/18.6.499. PMID: 4337382. Scope: LDL-C (mg/dL) = total cholesterol − HDL-C − triglycerides/5; valid when triglycerides are below 400 mg/dL in the original method. (1972)

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