Healthtus Health Tool

Cholesterol Ratio Calculator

Calculate your Total:HDL and HDL:LDL cholesterol ratios using American Heart Association (AHA) guidelines. These ratios help assess your cardiovascular risk by evaluating the balance between good (HDL) and bad (LDL) cholesterol. Get instant, evidence-based feedback and recommendations for your heart health.

Calculate Ratios

100% Free No Registration Instant Results Privacy First

Your Total:HDL ratio

How to Use This Tool

1. Select Unit

mg/dL or mmol/L

2. Enter HDL

Good cholesterol

3. Enter LDL

Bad cholesterol

4. Enter Total

Total cholesterol

5. Get Results

View ratios & advice

Unit

Please select a unit.

HDL (Good Cholesterol)

Please enter a valid HDL level (1–200).

LDL (Bad Cholesterol)

Please enter a valid LDL level (1–400).

Total Cholesterol

Please enter a valid total cholesterol level (1–600).

Note: This calculator follows the American Heart Association (AHA) guidelines. For medical advice, always consult your healthcare provider.

Formula & Calculation

Total:HDL Ratio = Total Cholesterol ÷ HDL

HDL:LDL Ratio = HDL ÷ LDL

Both ratios help assess cardiovascular risk. A lower Total:HDL ratio and higher HDL:LDL ratio are better.

Results are rounded to 2 decimal places for clarity.

Quick Reference Cholesterol Table

Cholesterol ratio risk categories according to AHA guidelines.
Category	Total:HDL Ratio	HDL:LDL Ratio	Risk Level
Excellent	< 3.5	> 0.4	Low
Good	3.5 – 5.0	0.3 – 0.4	Moderate
High Risk	> 5.0	< 0.3	High

How We Calculated

Input: We collected your HDL, LDL, and total cholesterol levels.
Conversion: If mmol/L was selected, values were converted to mg/dL for calculations.
Ratios: Calculated Total:HDL and HDL:LDL ratios using standard formulas.
Assessment: Compared ratios to AHA guidelines to determine your risk level.

Why Trust This Tool?

AHA Guidelines
Based on official standards

Data stays in your browser
No server storage

No registration needed
Use instantly

Mobile-friendly
Works on all devices

Updated frequently
Latest health guidelines

Completely free
No hidden charges

Accuracy & Standards

This calculator uses the American Heart Association (AHA) cholesterol ratio guidelines. Results are rounded to 2 decimal places. The tool is for educational purposes—not a substitute for professional medical advice.

Unit Relationship

1 mmol/L
= 38.67 mg/dL

⇄

1 mg/dL
= 0.02586 mmol/L

Healthy HDL:
≥ 40 mg/dL (men)
≥ 50 mg/dL (women)

Learn About Cholesterol

What is Cholesterol?

Cholesterol is a waxy substance found in your blood. Your body needs it to build cells, but too much can lead to plaque buildup in arteries. There are two main types: HDL (good) and LDL (bad).

Why Ratios Matter

Cholesterol ratios provide a more complete picture of your cardiovascular risk than individual cholesterol numbers alone. The Total:HDL ratio is a particularly strong predictor of heart disease risk.

Managing Cholesterol

A heart-healthy diet, regular exercise, maintaining a healthy weight, and avoiding smoking can improve your cholesterol levels. Your doctor may prescribe medication if lifestyle changes aren't enough.

Real-World Examples

Example 1: Total 180, HDL 60, LDL 100 → Total:HDL 3.00, HDL:LDL 0.60 (Excellent)
Example 2: Total 220, HDL 50, LDL 130 → Total:HDL 4.40, HDL:LDL 0.38 (Good)
Example 3: Total 260, HDL 40, LDL 160 → Total:HDL 6.50, HDL:LDL 0.25 (High Risk)

Limitations of This Tool

Does not replace professional medical diagnosis.
Does not account for other risk factors like age, blood pressure, or smoking.
Single reading may not reflect your overall cholesterol profile.
Always consult a healthcare professional for medical advice.

Trust & Privacy

We take your privacy seriously. This tool:

Does not store data on any server
All calculations happen locally in your browser
No cookies are used for this tool

References

American Heart Association. Cholesterol Guidelines. Heart.org.
Centers for Disease Control and Prevention. Cholesterol Facts. CDC.gov.
National Institutes of Health. Cholesterol Management. NIH.gov.

Editorial Process

The Healthtus editorial team reviews this tool regularly to ensure accuracy and alignment with the latest cardiovascular guidelines. We update the content and references as new research emerges.

Last reviewed: July 2026

Frequently Asked Questions

What is a healthy Total:HDL ratio?

A Total:HDL ratio below 3.5 is considered excellent. Below 5 is good. Above 5 indicates increased cardiovascular risk.

What is a healthy HDL:LDL ratio?

An HDL:LDL ratio above 0.4 is considered good. Above 0.3 is acceptable. Below 0.3 indicates higher cardiovascular risk.

How accurate is this cholesterol ratio calculator?

This calculator uses AHA guidelines for cholesterol ratio assessment. It provides accurate ratio calculations based on your inputs, but should not replace professional medical diagnosis.

What should I do if my cholesterol ratios are high?

If your ratios are high, consult a healthcare professional. Lifestyle changes like diet, exercise, and weight management can help. Your doctor may prescribe medication if needed.

What's the difference between HDL and LDL?

HDL (High-Density Lipoprotein) is 'good' cholesterol that helps remove excess cholesterol from your arteries. LDL (Low-Density Lipoprotein) is 'bad' cholesterol that can build up in artery walls and increase heart disease risk.

Can I use this calculator for monitoring my cholesterol?

Yes, this calculator can help you track your cholesterol ratios over time. However, always consult your healthcare provider for medical advice and treatment decisions.

Related Health Tools