Calculated LDL (Friedewald + NIH)
LDL cholesterol by Friedewald and NIH (Sampson 2020) equations plus non-HDL; Friedewald invalid at TG >=400.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Total cholesterol
- 200 mg/dL
- HDL cholesterol
- 50 mg/dL
- Triglycerides
- 150 mg/dL
Result: Friedewald LDL 120; NIH LDL 123 mg/dL.
The tool opens with these values already filled in. Replace them with your own.
What you enter
- Total cholesterol
- HDL cholesterol
- Triglycerides
How this is calculated
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 ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.