How is the TC/HDL ratio calculated?

Divide total cholesterol by HDL cholesterol after converting both values to the same concentration units.

Does the ratio replace LDL or non-HDL cholesterol?

No. It is supplementary and does not replace LDL-C, non-HDL-C, triglycerides, ApoB when indicated, or comprehensive risk assessment.

Is there one universal TC/HDL cutoff?

No. Reference approaches vary by population and context, so this calculator reports the arithmetic without a universal risk category.

Educational reference only. Not a diagnostic tool. See full disclaimer.

CardiacTC/HDL Ratio

Total Cholesterol-to-HDL Ratio Calculator

Calculate the total cholesterol-to-HDL ratio with unit normalization.

Content updated: July 18, 2026View sources

Total cholesterol

HDL cholesterol

Total cholesterol-to-HDL ratio

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Supplementary lipid ratio; no universal category is assigned

About

The total cholesterol-to-HDL ratio relates total cholesterol to HDL-C after unit normalization. It is a supplementary lipid measure rather than a stand-alone cardiovascular assessment.

Formula

TC/HDL ratio = total cholesterol ÷ HDL cholesterol

Interpretation

What the result represents: A unitless ratio between two lipid-panel values.

Input units: Total cholesterol and HDL-C may independently use mg/dL or mmol/L.

Worked example: 200 mg/dL divided by 50 mg/dL gives 4.00.

Applicable population: People with contemporaneous total cholesterol and HDL-C results.

Interpretation limitations: The ratio does not replace LDL-C, non-HDL-C, triglycerides, or comprehensive cardiovascular risk assessment. No single cutoff applies to every population or determines lipid-lowering therapy.

References

FAQ

Related Calculators

Non-HDL Cholesterol

Calculate non-HDL cholesterol from total cholesterol and HDL-C.

LDL/HDL Ratio

Calculate the LDL-to-HDL cholesterol ratio with unit normalization.

Calculated LDL-C

Calculate LDL cholesterol with the traditional Friedewald equation.

Disclaimer

Educational and informational reference only. Not intended to replace professional medical advice, diagnosis, treatment, or independent verification.