Cholesterol Ratio Calculator
Total to HDL ratio and LDL estimate.
Enter your values
Enter the total cholesterol in mg/dL.
Enter the hdl in mg/dL.
Enter the triglycerides in mg/dL.
Results update instantly as you type — no submit needed. Your values are remembered on this device, and the shareable link reopens the calculator with exactly these numbers.
- Total : HDL ratio
- 3.75 : 1
- LDL (Friedewald)
- 119 mg/dL
- Non-HDL cholesterol
- 143 mg/dL
- Risk band
- Average
- Triglyceride : HDL
- 2.31
Quick answer
The total-to-HDL cholesterol ratio predicts cardiovascular risk better than total cholesterol alone; below 3.5 is ideal.
LDL = Total − HDL − Triglycerides/5
At a glance
| What it does | Total to HDL ratio and LDL estimate. |
|---|---|
| Category | Health |
| Inputs needed | Total cholesterol, HDL, Triglycerides |
| Main output | Total : HDL ratio |
| Formula | LDL = Total − HDL − Triglycerides/5 |
| Cost | Free — no sign-up, no download |
How to use the Cholesterol Ratio Calculator
- 1Enter values from your lipid panel in mg/dL.
- 2Ensure you fasted if triglycerides were measured.
- 3Discuss results with your clinician.
Inputs explained
- Total cholesterol(mg/dL)
- Enter the total cholesterol in mg/dL.
- HDL(mg/dL)
- Enter the hdl in mg/dL.
- Triglycerides(mg/dL)
- Enter the triglycerides in mg/dL.
Worked example
Using the values the calculator loads with:
Inputs
- Total cholesterol195 mg/dL
- HDL52 mg/dL
- Triglycerides120 mg/dL
Results
- Total : HDL ratio3.75 : 1
- LDL (Friedewald)119 mg/dL
- Non-HDL cholesterol143 mg/dL
- Risk bandAverage
- Triglyceride : HDL2.31
Frequently asked questions
Is Friedewald always valid?
No — it is unreliable when triglycerides exceed 400 mg/dL.
What is a good HDL?
Above 40 mg/dL for men and 50 for women.
What do I need to enter into the Cholesterol Ratio Calculator?
Just 3 values: total cholesterol, hdl, triglycerides. Every field starts with a realistic example, so you can change one number at a time and watch the result update instantly.
How does the Cholesterol Ratio Calculator work out the answer?
The total-to-HDL cholesterol ratio predicts cardiovascular risk better than total cholesterol alone; below 3.5 is ideal. It applies the formula LDL = Total − HDL − Triglycerides/5 and shows the working so you can check each step by hand.
Is the Cholesterol Ratio Calculator free, and do I need an account?
It is completely free with no sign-up, no download and no usage limit. Everything is calculated in your browser, so the numbers you type never leave your device.
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.