Calculated LDL (Friedewald + NIH)
Calculated LDL (Friedewald + NIH) - a deterministic tool in Sophie Well's Clinical Math & Conversions group.
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What this is
Calculated LDL (Friedewald + NIH) is one of 230 deterministic tools in Sophie Well's Clinical Math & Conversions group. Calculated LDL (Friedewald + NIH) - a deterministic tool in Sophie Well's Clinical Math & Conversions group.
When to use it
Use this tool when you need a quick, citable reference. Every calculation runs entirely in your browser - no inputs leave your device, no account is required, no AI is involved. The site enforces a strict Content Security Policy and ships no analytics or third-party CDN.
References
Friedewald WT, Levy RI, Fredrickson DS. Clin Chem. 1972;18(6):499-502 (LDL = TC - HDL - TG/5). Second estimate: NIH equation, Sampson M, et al. JAMA Cardiol. 2020;5(5):540-548 (accurate at high TG / low LDL). Read the source ↗
Worked example: Friedewald LDL 120; NIH LDL 123 mg/dL.
Sophie Well is a reference and educational tool. Not medical, legal, or financial advice. Does not replace clinician judgment, professional billing review, or legal counsel.