Use this page to estimate LDL cholesterol from total cholesterol, HDL cholesterol, and triglycerides entered in mmol/L. It also shows derived lipid values, a graph, saved history, and exportable results. This page is educational and should not replace personal medical advice.
Enter Lipid Values
Plotly Graph
Submit values to draw the lipid component graph here.
Saved Calculation History
Up to 12 recent results are kept in the current session for review and export.
| Saved At | Reference | TC | HDL | TG | Estimated VLDL | Estimated LDL | Non-HDL | TC / HDL | Status |
|---|---|---|---|---|---|---|---|---|---|
| No saved calculations yet. | |||||||||
Formula Used
LDL-C = Total Cholesterol − HDL-C − (Triglycerides ÷ 2.2)
Estimated VLDL-C = Triglycerides ÷ 2.2
Non-HDL Cholesterol = Total Cholesterol − HDL-C
Remnant Cholesterol = Total Cholesterol − HDL-C − LDL-C
TC / HDL Ratio = Total Cholesterol ÷ HDL-C
This page expects all core lipid values in mmol/L. It gives an estimated LDL value rather than a directly measured LDL result.
When triglycerides are very high, the page warns instead of returning an LDL estimate. That helps avoid showing a value from an unsuitable input range.
Use the mmol/L result for quick review, and use the converted mg/dL values when you need a second reporting format.
How to Use This Calculator
- Enter total cholesterol, HDL cholesterol, and triglycerides exactly as reported by the laboratory in mmol/L.
- Choose fasting or non-fasting status so your saved report has the right context.
- Select the result precision you want for display and export.
- Optionally add a reference label such as a visit name, date code, or sample note.
- Press Calculate LDL to show the result card above the form.
- Review the graph, derived values, and saved history.
- Use the CSV or PDF buttons to export your session results.
Example Data Table
| Example | Total Cholesterol (mmol/L) | HDL (mmol/L) | Triglycerides (mmol/L) | Estimated VLDL (mmol/L) | Estimated LDL (mmol/L) |
|---|---|---|---|---|---|
| Case 1 | 5.20 | 1.30 | 1.50 | 0.68 | 3.22 |
| Case 2 | 4.60 | 1.40 | 0.90 | 0.41 | 2.79 |
| Case 3 | 6.10 | 1.10 | 2.00 | 0.91 | 4.09 |
FAQs
1. What does this calculator estimate?
It estimates LDL cholesterol from total cholesterol, HDL cholesterol, and triglycerides entered in mmol/L. It also shows non-HDL cholesterol, estimated VLDL, ratios, graph output, and exportable history.
2. Which values do I need before calculating?
You need three values from a lipid profile: total cholesterol, HDL cholesterol, and triglycerides. Enter all of them in mmol/L exactly as reported by the lab.
3. Does this page accept mg/dL inputs?
No. The inputs are designed for mmol/L. The page converts the result to mg/dL for convenience after calculation, but the entered values should remain in mmol/L.
4. Why does the page stop when triglycerides are high?
The estimate on this page is intentionally blocked when triglycerides are 4.52 mmol/L or higher. That prevents displaying a value from an input range where the simple estimate is less dependable.
5. Is this a diagnosis or treatment tool?
No. It is a calculation and reporting tool. Lab context, personal targets, medication decisions, and clinical interpretation should be reviewed with a qualified clinician.
6. What is non-HDL cholesterol here?
Non-HDL cholesterol is calculated as total cholesterol minus HDL cholesterol. It can be useful as a quick summary of cholesterol carried by lipoproteins other than HDL.
7. What do the CSV and PDF buttons export?
They export the saved session history table. The PDF also includes a compact current result summary when one is available on the page.
8. Can I store several calculations in one visit?
Yes. Each successful calculation is added to the history table. The page keeps up to 12 recent entries in the current session until you clear them.