Non-HDL Cholesterol Calculator

Calculate non-HDL cholesterol — the total of all atherogenic lipoprotein cholesterol — by subtracting HDL from total cholesterol, and compare it against guideline target bands.

🧪 Lab Value📐 Non-HDL = Total cholesterol − HDL cholesterol🏥 Health
Total cholesterol (mg/dL)
HDL cholesterol (mg/dL)
Please enter valid values.

Formula & Reference

VariableSymbolFormulaUnits
Non-HDL Cholesterol Calculator—Non-HDL = Total cholesterol − HDL cholesterolmg/dL

Step-by-Step Examples

Example 1
Optimal Profile

Total cholesterol 175, HDL 60 mg/dL.

  • Non-HDL = 175 − 60
  • Non-HDL = 115 mg/dL
  • Falls below the 130 mg/dL optimal threshold
✓ Non-HDL 115 mg/dL — optimal
Example 2
Borderline Profile

Total cholesterol 215, HDL 45 mg/dL.

  • Non-HDL = 215 − 45
  • Non-HDL = 170 mg/dL
  • Falls in the borderline high band
✓ Non-HDL 170 mg/dL — borderline high
Example 3
High Triglyceride Case

Total cholesterol 280, HDL 35, triglycerides 520 mg/dL.

  • Non-HDL = 280 − 35 = 245 mg/dL
  • Calculated LDL would be unavailable at these triglycerides
  • Non-HDL remains fully interpretable
✓ Non-HDL 245 mg/dL — very high, and still measurable

Real-World Applications

🧪
High Triglyceride Patients
When triglycerides exceed 400 mg/dL and calculated LDL becomes unavailable, non-HDL remains a valid and interpretable target.
🍝
Non-Fasting Testing
Because it involves no triglyceride-derived estimate, non-HDL is reliable on non-fasting samples — a practical advantage in routine screening.
❤️
Residual Risk Assessment
Non-HDL captures VLDL and remnant particles that LDL alone misses, which is why it often predicts events better in patients with metabolic syndrome or diabetes.
📚
Lipidology Education
Non-HDL is taught as the simplest available surrogate for total atherogenic particle burden.

Common Mistakes to Avoid

⚠️
Confusing non-HDL with LDL

Non-HDL includes LDL plus VLDL, IDL, and lipoprotein(a) cholesterol. It is always higher than LDL, typically by around 30 mg/dL in people with normal triglycerides.

⚠️
Applying LDL targets directly to non-HDL

Guideline non-HDL targets sit roughly 30 mg/dL above the matching LDL target. Using the LDL number as a non-HDL goal sets an unrealistically strict target.

⚠️
Overlooking it because LDL is normal

Patients with high triglycerides can have an at-target LDL alongside a clearly elevated non-HDL, which is precisely the residual risk that non-HDL was designed to expose.

Frequently Asked Questions

What is non-HDL cholesterol? ▾
The cholesterol carried by every atherogenic lipoprotein — LDL, VLDL, IDL, remnants, and lipoprotein(a) — obtained simply by subtracting HDL from total cholesterol.
Why is non-HDL sometimes preferred over LDL? ▾
It requires no estimating equation, stays valid when triglycerides are high or the patient has not fasted, and captures atherogenic particles that LDL measurement alone omits.
What is a good non-HDL level? ▾
Under 130 mg/dL is generally regarded as optimal for the general population, with progressively lower targets applied as cardiovascular risk rises.
How does non-HDL relate to apolipoprotein B? ▾
Both estimate atherogenic particle burden. ApoB counts particles directly and is somewhat more precise, but non-HDL needs no additional test beyond a standard lipid panel.
Do I need to fast to measure non-HDL? ▾
No. Total cholesterol and HDL change little after eating, which is one of the main practical advantages of using non-HDL.

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