Heart & circulation
Cholesterol Ratio Calculator
Use this free cholesterol ratio calculator to find your total-to-HDL ratio from two numbers on your lipid panel, and see what that balance means for your heart.
- Free to use
- Works on your phone
- Nothing saved or shared
How to use this cholesterol ratio calculator
This cholesterol ratio calculator turns two numbers from your lipid panel into your total cholesterol to HDL ratio. It takes three simple steps.
- Find your total cholesterol and your HDL on your lipid panel.
- Type both numbers in, using the same units for each (mg/dL or mmol/L both work).
- Press Calculate my ratio to see your result and what it means.
What your cholesterol ratio means
Your total cholesterol to HDL ratio compares all the cholesterol in your blood to your HDL, the helpful kind that clears cholesterol out of your arteries. A lower number means HDL makes up a healthier share of the total. Here is the usual guide to a good cholesterol ratio:
- Below 3.5 is ideal.
- 3.5 to 5 is acceptable, with room to improve.
- Above 5 suggests higher heart risk and is worth a conversation with your doctor.
Cholesterol ratio chart
This chart shows the same bands at a glance. The calculator above gives your exact figure, while the chart is handy for a quick check of where a good cholesterol ratio sits.
| Ratio | What it means |
|---|---|
| Below 3.5 | Ideal |
| 3.5 to 5 | Acceptable, room to improve |
| Above 5 | Higher heart risk |
Why the ratio is useful
Two people can have the same total cholesterol but very different risk, depending on how much of it is the helpful HDL kind. The total cholesterol to HDL ratio captures that balance in a single, easy number. Raising HDL through regular movement and healthy fats, along with a simple juice for cholesterol, while keeping total cholesterol in check, moves the ratio in the right direction.
You may also see a separate LDL to HDL ratio on some lab reports, and an LDL calculator can help you check that figure. That one compares your harmful LDL to your HDL, rather than your total cholesterol to HDL. The two ratios answer slightly different questions, but the same idea holds for both: a lower number reflects a healthier balance. Whichever your doctor uses, the ratio reads the same in mg/dL or mmol/L, since dividing two numbers in the same units gives an identical result.
Answers
Frequently asked questions
What is a good cholesterol ratio?
The total cholesterol to HDL ratio is best kept below 5, and below 3.5 is considered ideal. A lower ratio means a larger share of your cholesterol is the helpful HDL kind. Doctors use it alongside your other numbers, not on its own.
How do you calculate the cholesterol ratio?
It is simply your total cholesterol divided by your HDL cholesterol. For example, a total of 200 and an HDL of 50 gives a ratio of 4.0. Because it is a division of two numbers in the same units, mg/dL and mmol/L give the same ratio.
Is the ratio better than LDL on its own?
Neither is better, they answer different questions. LDL tells you how much harmful cholesterol you carry. The ratio tells you the balance between total and helpful cholesterol. Looking at both gives a fuller picture of heart risk.
How can I improve my cholesterol ratio?
You can improve it by raising HDL, lowering total cholesterol, or both. Regular exercise, not smoking, healthy fats like olive oil and oily fish, and losing extra weight all tend to help the ratio move in the right direction.
Is a good cholesterol ratio different for men and women?
The same target applies to both, with below 3.5 ideal and under 5 acceptable. On average women run a little lower because they tend to have higher HDL. Your doctor reads the ratio alongside your other numbers to judge what is right for you.
What is the difference between the cholesterol ratio and the LDL to HDL ratio?
The cholesterol ratio compares your total cholesterol to your HDL, while the LDL to HDL ratio compares the harmful LDL to your HDL. Both describe the balance between the cholesterol you want less of and the helpful HDL kind, and for both a lower number is better. Your doctor may look at either one, so it helps to know which ratio your lab report is showing.
Does the ratio work in mmol/L as well as mg/dL?
Yes. Because the ratio simply divides two numbers that are in the same units, you get the same ratio whether you use mg/dL or mmol/L. Just make sure both boxes use the same units, and the result will mean the same thing either way.