What is a good ApoB level?

Commonly-cited reference points put ApoB under 65 mg/dL (0.65 g/L) as an optimal or aggressive target, 65–79 as desirable, 80–99 as borderline, 100–119 as high, and 120 or above as very high. Lower targets — often under 65 mg/dL — are usually cited for people at higher risk or with existing cardiovascular disease. These are heuristics, not universal cut-offs; targets are individualized by a clinician.

How is ApoB different from LDL cholesterol?

LDL-C measures the mass of cholesterol carried inside LDL particles; ApoB counts the particles themselves — one ApoB protein per atherogenic particle (LDL, VLDL, IDL, Lp(a)). Because particle number drives plaque risk more directly than cholesterol mass, ApoB and LDL-C can diverge, especially with small dense LDL or high triglycerides.

ApoB Context Tool — Interpret Your ApoB Result

Your result

Units

Risk context

Higher risk = existing cardiovascular disease, diabetes, or elevated calculated risk. Lower targets apply.

ApoB

mg/dL

g/L is just mg/dL divided by 100 — 0.85 g/L = 85 mg/dL.

Your ApoB

85 mg/dL · 0.85 g/L

Borderline

In mg/dL—

In g/L—

Commonly-cited target for this context—

Interpretation—

These bands are widely-cited heuristics, not universal cut-offs — labs, guidelines, and clinicians differ on exact thresholds, and the right target for you depends on your overall risk, family history, Lp(a), and other factors only a clinician can weigh. This tool is educational context only; it does not diagnose anything or recommend treatment.

How this works

Methodology reviewed July 2026

ApoB counts the number of atherogenic lipoprotein particles in your blood — arguably a better marker of cardiovascular risk than LDL cholesterol, because it measures particle number directly. The tool places your value against commonly-cited reference bands and shifts the target when you flag higher baseline risk, since lower ApoB targets apply to higher-risk people.

Formula

g/L = mg/dL ÷ 100
Common reference bands (mg/dL):
  < 65 optimal · 65–79 desirable · 80–99 borderline · 100–119 high · ≥ 120 very high

Inputs

ApoB value (mg/dL or g/L) · Risk context

Outputs

Value in both units · Reference band · Distance from a context-based target

Assumptions

Reference bands are widely-cited heuristics, not a single universal standard.
Lower targets apply to people with existing ASCVD or higher baseline risk.

Limitations

Thresholds are individualized by a clinician against your whole risk picture — one number in isolation decides nothing.
ApoB and LDL-C can diverge; a "normal" LDL with high ApoB is exactly the case worth catching.

Safety

Educational context only — not a treatment target and not medical advice.

This calculator is for educational purposes only and is not medical advice, diagnosis, or treatment. Results are estimates based on published formulas and population averages — your individual values may differ. Nothing here is calculated on a server: everything runs in your browser and no data is stored or sent anywhere. Always consult a qualified clinician before making health, medication, or training decisions.