Your apolipoprotein B (ApoB) level is one of the most useful single numbers for estimating long-term cardiovascular risk. ApoB is the protein on the outside of every atherogenic lipoprotein particle — LDL, IDL, VLDL, lipoprotein(a) — so an ApoB measurement tells you, in one go, how many of these risk-carrying particles are circulating in your blood.
The calculator below shows roughly where your ApoB sits compared to other adults of your age and sex, using population data from the US NHANES III survey (Bachorik et al., 1997).
Important context
Average is not optimal. The 50th percentile ApoB in the general population sits around 100 mg/dL — but the cardiovascular-optimal ApoB is much lower, typically below 60–80 mg/dL. So “you’re around average for your age” is not actually reassuring. The point of comparing to the population is to put your number in context, not to set a target.
About this calculator
Percentile cut-offs are derived from the third US National Health and Nutrition Examination Survey (NHANES III, 1988–1991), as published by Bachorik PS et al. (1997). The calculator linearly interpolates between published percentiles for your age and sex group. It is general information, not a substitute for advice from your own doctor.
Frequently asked questions
What is a normal ApoB level?
Population-average ApoB is around 100 mg/dL, but average is not optimal. Cardiovascular-optimal ApoB is usually below 80 mg/dL, and lower still for higher-risk people. This tool shows your percentile for your age and sex.
Why does ApoB matter more than LDL cholesterol?
ApoB counts every atherogenic particle directly, while LDL cholesterol only estimates the cholesterol those particles carry. When the two disagree, ApoB is the more reliable predictor of cardiovascular risk.