Non-HDL Cholesterol Calculator

Overview

Calculates non-HDL cholesterol from total cholesterol and HDL cholesterol.

Clinical Significance

Non-HDL cholesterol represents cholesterol carried by atherogenic apoB-containing particles. It can be useful when triglycerides are elevated and does not require a fasting sample.

When to Use

• Assess atherogenic cholesterol burden from a standard lipid profile.
• Use when triglycerides make calculated LDL-C less reliable.
• Track response to lipid-lowering treatment using local targets.

How It Is Calculated

• Non-HDL cholesterol = total cholesterol − HDL cholesterol.
• The calculator validates the required inputs before applying the equation and rounds only the displayed result.

Interpretation

• Non-HDL cholesterol represents cholesterol carried by atherogenic apoB-containing particles. It can be useful when triglycerides are elevated and does not require a fasting sample.
• Review the component values and assumptions as well as the final result.

Worked Example

Enter clinically plausible values in the stated units. MedicalC applies: Non-HDL cholesterol = total cholesterol − HDL cholesterol. Review the displayed result against the source data and the relevant clinical pathway.

Patient Considerations

• Confirm that the patient and clinical setting match the population or physiologic assumptions behind the equation.
• Consider whether treatment, organ function, pregnancy, body composition, sampling conditions or acute illness materially alter interpretation.
• Use serial calculations only when methods and units remain comparable.

Limitations

• Targets differ by guideline, risk category and country.
• The result does not distinguish among individual apoB-containing lipoproteins.
• Laboratory and biological variation still apply.

Clinical Pearls

• Non-HDL cholesterol is valid whether or not Friedewald LDL-C can be calculated.
• Use the same unit for total and HDL cholesterol.
• Consider apoB measurement when particle number is clinically important.

Common Mistakes

• Subtracting LDL-C rather than HDL-C from total cholesterol.
• Mixing mmol/L and mg/dL.
• Applying a treatment target without confirming the patient's risk group.

Evidence Base

The implementation uses the published or established relationship: Non-HDL cholesterol = total cholesterol − HDL cholesterol. The cited source should be reviewed alongside current specialty guidance before clinical deployment.

References

1. 2019 ESC/EAS Guidelines for the management of dyslipidaemias. — Primary publication, authoritative guideline or recognised clinical source supporting the calculation.