Online Tool Store
Cholesterol Ratio Calculator
Calculate your total cholesterol to HDL ratio (and optionally LDL:HDL) from a recent lab result, with reference range guidance. Runs entirely in your browser.
🔒 This tool runs entirely in your browser. Your files are never uploaded to a server.
Total : HDL ratio
LDL : HDL ratio
How the cholesterol ratio calculator works
- Enter your total cholesterol and HDL values from a recent lab result.
- Optionally add LDL to see the LDL:HDL ratio as well.
- Review the calculated ratio and where it falls relative to commonly cited reference ranges.
FAQ
How is the cholesterol ratio calculated?
By dividing total cholesterol by HDL ("good") cholesterol. A lower ratio generally indicates a healthier balance between total and protective cholesterol.
What is considered a good ratio?
Below 3.5 is generally considered optimal, 3.5-5 is average, and above 5 is often flagged as higher risk - though exact thresholds vary by guideline and individual risk factors.
What is the LDL:HDL ratio for?
It's an additional reference point some clinicians use alongside the total:HDL ratio - entering your LDL value is optional.
Does this replace a doctor's assessment?
No - cardiovascular risk depends on many factors beyond a single ratio, including age, blood pressure, smoking status, and family history. Always discuss lab results with a healthcare provider.
Is LDL required to use the calculator?
No - LDL is optional. Enter total cholesterol and HDL to get the total:HDL ratio, and add LDL only if you also want the LDL:HDL ratio shown.
How we compare
| Feature | Online Tool Store | Manual calculation | Lab portal report |
|---|---|---|---|
| Instant calculation | ✓ | ✗ | ✓ |
| Plain-language range guidance | ✓ | ✗ | ✗ |
| No portal login required | ✓ | ✓ | ✗ |
A quick way to understand a lab result number before your next doctor's appointment.