Blood cholesterol
Total cholesterol
Cholesterol ratios
Cholesterol/HDL ratio
Triglycerides/HDL ratio
LDL/HDL ratio

Cholesterol Ratio Calculator


This cholesterol ratio calculator allows you for a quick self-diagnosis. Basing on your blood test results, it calculates the most popular cholesterol indicators (LDL/HDL, triglycerides/HDL, and total cholesterol/HDL ratio), making it easy to assess heart disease risks and your general health condition. Read on to learn how to calculate these cholesterol ratios or take a look at our BMI calculator.

Remember that this calculator is in no case an equivalent of a doctor consultation! If the results are troubling, remember to pay a visit to your physician.

Total cholesterol, HDL, LDL, and triglycerides

Our cholesterol ratio calculator takes into account four basic blood test results. All recommended levels are taken from eMedTV.

You only need to input three of your results - they are dependent on each other according to the formula:

total cholesterol = HDL + LDL + 0.2 * triglycerides

  1. Total cholesterol is just an overview of your cholesterol level. It might be misleading, as it combines the levels of good and bad cholesterol in your blood and does not give sufficient information about heart disease risks.
  • Desirable: Less than 200 mg/dL
  • Borderline high: 200-239 mg/dL
  • High: 240 mg/dL and above
  1. HDL (High-density lipoprotein) is the "good" cholesterol in your blood. Generally speaking, it helps to transfer cholesterol from other parts of your body to the liver and to remove it. That's why this is the only cholesterol type that should be kept high. Women tend to have slightly higher HDL levels than men.
  • Optimal: 60 mg/dL and above
  • Borderline: 40-59 mg/dL
  • Risk of heart disease: Less than 40 mg/dL
  1. LDL (Low-density lipoprotein) is the "bad" cholesterol that accumulates in your arteries and can cause serious medical conditions, such as heart strokes. The lower the LDL level, the better. Remember that even if your LDL level is high, you should consult a doctor to investigate risk factors that can lead to heart diseases. Use our LDL calculator to estimate its value based on total cholesterol, HDL and triglyceride levels.
  • Optimal: Less than 100 mg/dL
  • Near optimal/above optimal: 100-129 mg/dL
  • Borderline high: 130-159 mg/dL
  • High: 160-189 mg/dL
  • Very high: 190 mg/dL and above
  1. Triglycerides are not actually cholesterol, but a type of fat transported within your blood. Most of the triglycerides in your body are stored as body fat. Still, high triglyceride levels may be a sign of a lipoprotein problem, as it is often accompanied by other symptoms such as diabetes.
  • Normal: Less than 150 mg/dL
  • Borderline high: 150-199 mg/dL
  • High: 200-499 mg/dL
  • Very high: 500 mg/dL or above

How to calculate cholesterol ratios?

There are three indicators that describe your heart disease risk with high accuracy. They are all built as ratios of the aforementioned blood results and are therefore called cholesterol ratios.

You can use this total cholesterol calculator to find the following values:

  1. LDL/HDL ratio is simply the LDL level divided by the HDL level. It's one of the most popular measures of a heart disease risk.
  • ideal: below 2.0
  • good: below 5.0
  • too high: above 5.0
  1. Triglyceride/HDL ratio can be calculated by dividing your triglyceride level by HDL level. It's a less popular indicator; nevertheless, it is also used to determine heart stroke risks.

Our calculator by default estimates this ratio for triglyceride values given in mmol/L, or converts them to mmol/L, so even if you enter your results in mg/dL, the normal range is:

  • ideal: 2.0 or less
  • high: 4.0 - 6.0
  • too high: 6.0 or above

For a calculation of this ratio in mg/dL (click on the advanced mode button), the normal range of the ratio value is different:

  • ideal: 0.87 or less
  • high: 1.74 - 2.62
  • too high: 2.62 or above

Check out our cholesterol units calculator to understand fully the conversion between mmol/L and mg/dL.

  1. Total cholesterol/HDL (TC/HDL) ratio is found by dividing the total cholesterol level by the HDL level. It is considered the worst of these three indicators - the American Heart Association does not recommend using it for diagnosis. Still, you can look at this number to get a general idea of your health condition.
  • ideal: under 3.5
  • good: under 5.0
  • bad: over 5.0
Bogna Haponiuk

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Cholesterol Ratio Calculator